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pistachio: add kernel 4.14 support

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Add patches and config for 4.14, refreshed from 4.9.

Signed-off-by: Matti Laakso <matti.laakso@outlook.com>
v19.07.3_mercusys_ac12_duma
Matti Laakso 6 years ago committed by Hauke Mehrtens
parent 2534141322
commit cae808946a
17 changed files with 2442 additions and 0 deletions
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362
target/linux/pistachio/config-4.14
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CONFIG_ARCH_BINFMT_ELF_STATE=y
CONFIG_ARCH_CLOCKSOURCE_DATA=y
CONFIG_ARCH_DISCARD_MEMBLOCK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
# CONFIG_ARCH_HAS_GCOV_PROFILE_ALL is not set
# CONFIG_ARCH_HAS_SG_CHAIN is not set
# CONFIG_ARCH_HAS_STRICT_KERNEL_RWX is not set
# CONFIG_ARCH_HAS_STRICT_MODULE_RWX is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_ARCH_MMAP_RND_BITS_MAX=15
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=15
# CONFIG_ARCH_OPTIONAL_KERNEL_RWX is not set
# CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT is not set
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y
CONFIG_ARCH_USE_QUEUED_SPINLOCKS=y
# CONFIG_ARCH_WANTS_THP_SWAP is not set
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_SD=y
CONFIG_BLK_SCSI_REQUEST=y
CONFIG_BOARD_SCACHE=y
CONFIG_BOOT_ELF32=y
CONFIG_CEVT_R4K=y
CONFIG_CLKDEV_LOOKUP=y
CONFIG_CLKSRC_MIPS_GIC=y
CONFIG_CLKSRC_PISTACHIO=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_COMMON_CLK=y
# CONFIG_COMMON_CLK_BOSTON is not set
CONFIG_CONNECTOR=y
CONFIG_CPU_GENERIC_DUMP_TLB=y
CONFIG_CPU_HAS_PREFETCH=y
CONFIG_CPU_HAS_RIXI=y
CONFIG_CPU_HAS_SYNC=y
# CONFIG_CPU_HOTPLUG_STATE_CONTROL is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_CPU_MIPS32=y
CONFIG_CPU_MIPS32_R2=y
CONFIG_CPU_MIPSR2=y
CONFIG_CPU_MIPSR2_IRQ_EI=y
CONFIG_CPU_MIPSR2_IRQ_VI=y
CONFIG_CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS=y
CONFIG_CPU_PM=y
CONFIG_CPU_R4K_CACHE_TLB=y
CONFIG_CPU_R4K_FPU=y
CONFIG_CPU_RMAP=y
CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HIGHMEM=y
CONFIG_CPU_SUPPORTS_MSA=y
CONFIG_CRC16=y
CONFIG_CRC_CCITT=y
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_CRC32C=y
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_LZO=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CSRC_R4K=y
CONFIG_DMADEVICES=y
CONFIG_DMA_ENGINE=y
CONFIG_DMA_NONCOHERENT=y
# CONFIG_DMA_NOOP_OPS is not set
CONFIG_DMA_OF=y
CONFIG_DMA_VIRTUAL_CHANNELS=y
# CONFIG_DMA_VIRT_OPS is not set
# CONFIG_DRM_LIB_RANDOM is not set
CONFIG_DTC=y
# CONFIG_DWMAC_DWC_QOS_ETH is not set
CONFIG_DWMAC_GENERIC=y
CONFIG_EARLY_PRINTK=y
CONFIG_EARLY_PRINTK_8250=y
CONFIG_EXPORTFS=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y
CONFIG_EXT4_FS_SECURITY=y
CONFIG_FIXED_PHY=y
CONFIG_FS_MBCACHE=y
CONFIG_FS_POSIX_ACL=y
CONFIG_FUTEX_PI=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_GENERIC_ATOMIC64=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_IO=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK=y
CONFIG_GENERIC_IRQ_IPI=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_GENERIC_PHY=y
CONFIG_GENERIC_PINCONF=y
CONFIG_GENERIC_PINCTRL_GROUPS=y
CONFIG_GENERIC_PINMUX_FUNCTIONS=y
CONFIG_GENERIC_SCHED_CLOCK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_IRQCHIP=y
CONFIG_GPIO_SYSFS=y
# CONFIG_GRO_CELLS is not set
CONFIG_HANDLE_DOMAIN_IRQ=y
CONFIG_HARDWARE_WATCHPOINTS=y
CONFIG_HAS_DMA=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
# CONFIG_HAVE_64BIT_ALIGNED_ACCESS is not set
# CONFIG_HAVE_ARCH_BITREVERSE is not set
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_KGDB=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
# CONFIG_HAVE_BOOTMEM_INFO_NODE is not set
CONFIG_HAVE_CBPF_JIT=y
CONFIG_HAVE_CC_STACKPROTECTOR=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_COPY_THREAD_TLS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_HAVE_DEBUG_KMEMLEAK=y
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_HAVE_IDE=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_KVM=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_HAVE_NET_DSA=y
CONFIG_HAVE_OPROFILE=y
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HOTPLUG_CPU=y
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_IMG=y
CONFIG_IMGPDC_WDT=y
CONFIG_IMG_MDC_DMA=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_IRQCHIP=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_DOMAIN_HIERARCHY=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_IRQ_MIPS_CPU=y
CONFIG_IRQ_WORK=y
CONFIG_JBD2=y
CONFIG_LEDS_PWM=y
CONFIG_LIBFDT=y
CONFIG_LKDTM=y
CONFIG_LOG_BUF_SHIFT=18
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_MACH_PISTACHIO=y
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0
CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MFD_SYSCON=y
CONFIG_MICREL_PHY=y
CONFIG_MIPS=y
CONFIG_MIPS_ASID_BITS=8
CONFIG_MIPS_ASID_SHIFT=0
CONFIG_MIPS_CLOCK_VSYSCALL=y
CONFIG_MIPS_CM=y
# CONFIG_MIPS_CMDLINE_DTB_EXTEND is not set
CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER=y
# CONFIG_MIPS_CMDLINE_FROM_DTB is not set
CONFIG_MIPS_CPC=y
CONFIG_MIPS_CPS=y
# CONFIG_MIPS_CPS_CPUIDLE is not set
# CONFIG_MIPS_CPS_NS16550 is not set
CONFIG_MIPS_CPS_PM=y
CONFIG_MIPS_CPU_SCACHE=y
# CONFIG_MIPS_ELF_APPENDED_DTB is not set
CONFIG_MIPS_EXTERNAL_TIMER=y
CONFIG_MIPS_GIC=y
# CONFIG_MIPS_HUGE_TLB_SUPPORT is not set
CONFIG_MIPS_L1_CACHE_SHIFT=5
# CONFIG_MIPS_MACHINE is not set
CONFIG_MIPS_MT=y
CONFIG_MIPS_MT_FPAFF=y
CONFIG_MIPS_MT_SMP=y
CONFIG_MIPS_NO_APPENDED_DTB=y
CONFIG_MIPS_PERF_SHARED_TC_COUNTERS=y
# CONFIG_MIPS_RAW_APPENDED_DTB is not set
CONFIG_MIPS_SPRAM=y
# CONFIG_MIPS_VPE_LOADER is not set
CONFIG_MMC=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_DW=y
# CONFIG_MMC_DW_EXYNOS is not set
# CONFIG_MMC_DW_K3 is not set
CONFIG_MMC_DW_PLTFM=y
CONFIG_MODULES_USE_ELF_REL=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_M25P80=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_ECC=y
CONFIG_MTD_SPI_NAND=y
CONFIG_MTD_SPI_NAND_DEVICES=y
CONFIG_MTD_SPI_NOR=y
CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=16384
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_BEB_LIMIT=20
CONFIG_MTD_UBI_BLOCK=y
CONFIG_MTD_UBI_FASTMAP=y
# CONFIG_MTD_UBI_GLUEBI is not set
CONFIG_MTD_UBI_WL_THRESHOLD=4096
CONFIG_NAMESPACES=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_NET_FLOW_LIMIT=y
CONFIG_NET_NS=y
CONFIG_NET_PTP_CLASSIFY=y
CONFIG_NLS=y
CONFIG_NO_GENERIC_PCI_IOPORT_MAP=y
CONFIG_NO_HZ=y
CONFIG_NO_HZ_COMMON=y
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_IOPORT_MAP is not set
CONFIG_NR_CPUS=4
CONFIG_OF=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_FLATTREE=y
CONFIG_OF_GPIO=y
CONFIG_OF_IRQ=y
CONFIG_OF_MDIO=y
CONFIG_OF_NET=y
CONFIG_PADATA=y
CONFIG_PCI_DRIVERS_LEGACY=y
CONFIG_PERF_USE_VMALLOC=y
CONFIG_PGTABLE_LEVELS=2
# CONFIG_PGTABLE_MAPPING is not set
CONFIG_PHYLIB=y
CONFIG_PHY_PISTACHIO_USB=y
CONFIG_PINCTRL=y
CONFIG_PINCTRL_PISTACHIO=y
CONFIG_PISTACHIO_GPTIMER_CLKSRC=y
CONFIG_POWER_SUPPLY=y
CONFIG_PPS=y
# CONFIG_PREEMPT_NONE is not set
CONFIG_PREEMPT_VOLUNTARY=y
CONFIG_PRINTK_TIME=y
CONFIG_PROC_EVENTS=y
CONFIG_PROFILING=y
CONFIG_PTP_1588_CLOCK=y
CONFIG_PWM=y
CONFIG_PWM_IMG=y
CONFIG_PWM_SYSFS=y
CONFIG_QUEUED_RWLOCKS=y
CONFIG_QUEUED_SPINLOCKS=y
CONFIG_RATIONAL=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=y
CONFIG_REGMAP_MMIO=y
CONFIG_REGMAP_SPI=y
CONFIG_REGULATOR=y
CONFIG_REGULATOR_FIXED_VOLTAGE=y
CONFIG_REGULATOR_GPIO=y
CONFIG_RESET_CONTROLLER=y
CONFIG_RESET_PISTACHIO=y
CONFIG_RFS_ACCEL=y
CONFIG_RPS=y
CONFIG_SCHEDSTATS=y
CONFIG_SCHED_INFO=y
CONFIG_SCSI=y
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SERIAL_8250_DW=y
# CONFIG_SERIAL_8250_FSL is not set
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_SG_POOL=y
CONFIG_SMP=y
CONFIG_SMP_UP=y
CONFIG_SPI=y
CONFIG_SPI_IMG_SPFI=y
CONFIG_SPI_MASTER=y
CONFIG_SRAM=y
CONFIG_SRCU=y
CONFIG_STMMAC_ETH=y
CONFIG_STMMAC_PLATFORM=y
CONFIG_SWPHY=y
CONFIG_SYNC_R4K=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_SYS_HAS_CPU_MIPS32_R2=y
CONFIG_SYS_HAS_EARLY_PRINTK=y
CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
CONFIG_SYS_SUPPORTS_HOTPLUG_CPU=y
CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
CONFIG_SYS_SUPPORTS_MIPS_CPS=y
CONFIG_SYS_SUPPORTS_MULTITHREADING=y
CONFIG_SYS_SUPPORTS_RELOCATABLE=y
CONFIG_SYS_SUPPORTS_SCHED_SMT=y
CONFIG_SYS_SUPPORTS_SMP=y
CONFIG_SYS_SUPPORTS_ZBOOT=y
CONFIG_THIN_ARCHIVES=y
CONFIG_TICK_CPU_ACCOUNTING=y
CONFIG_TIMER_OF=y
CONFIG_TIMER_PROBE=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_TREE_RCU=y
CONFIG_TREE_SRCU=y
CONFIG_UBIFS_FS=y
# CONFIG_UBIFS_FS_ADVANCED_COMPR is not set
CONFIG_UBIFS_FS_LZO=y
CONFIG_UBIFS_FS_ZLIB=y
CONFIG_USB=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
CONFIG_USB_COMMON=y
CONFIG_USB_DWC2=y
CONFIG_USB_DWC2_DUAL_ROLE=y
# CONFIG_USB_DWC2_TRACK_MISSED_SOFS is not set
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
CONFIG_USB_GADGET=y
CONFIG_USB_STORAGE=y
CONFIG_USB_SUPPORT=y
CONFIG_USER_NS=y
CONFIG_USE_GENERIC_EARLY_PRINTK_8250=y
CONFIG_USE_OF=y
CONFIG_WATCHDOG_CORE=y
CONFIG_WEAK_ORDERING=y
CONFIG_XPS=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZSMALLOC=y
# CONFIG_ZSMALLOC_STAT is not set

68
target/linux/pistachio/patches-4.14/101-dmaengine-img-mdc-Handle-early-status-read.patch
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From a2dd154377c9aa6ddda00d39b8c7c334e4fa16ff Mon Sep 17 00:00:00 2001
From: Damien Horsley <damien.horsley@imgtec.com>
Date: Tue, 22 Mar 2016 12:46:09 +0000
Subject: dmaengine: img-mdc: Handle early status read
It is possible that mdc_tx_status may be called before the first
node has been read from memory.
In this case, the residue value stored in the register is undefined.
Return the transfer size instead.
Signed-off-by: Damien Horsley <damien.horsley@imgtec.com>
---
drivers/dma/img-mdc-dma.c | 40 ++++++++++++++++++++++++----------------
1 file changed, 24 insertions(+), 16 deletions(-)
--- a/drivers/dma/img-mdc-dma.c
+++ b/drivers/dma/img-mdc-dma.c
@@ -620,25 +620,33 @@ static enum dma_status mdc_tx_status(str
(MDC_CMDS_PROCESSED_CMDS_DONE_MASK + 1);
/*
- * If the command loaded event hasn't been processed yet, then
- * the difference above includes an extra command.
+ * If the first node has not yet been read from memory,
+ * the residue register value is undefined
*/
- if (!mdesc->cmd_loaded)
- cmds--;
- else
- cmds += mdesc->list_cmds_done;
-
- bytes = mdesc->list_xfer_size;
- ldesc = mdesc->list;
- for (i = 0; i < cmds; i++) {
- bytes -= ldesc->xfer_size + 1;
- ldesc = ldesc->next_desc;
- }
- if (ldesc) {
- if (residue != MDC_TRANSFER_SIZE_MASK)
- bytes -= ldesc->xfer_size - residue;
+ if (!mdesc->cmd_loaded && !cmds) {
+ bytes = mdesc->list_xfer_size;
+ } else {
+ /*
+ * If the command loaded event hasn't been processed yet, then
+ * the difference above includes an extra command.
+ */
+ if (!mdesc->cmd_loaded)
+ cmds--;
else
+ cmds += mdesc->list_cmds_done;
+
+ bytes = mdesc->list_xfer_size;
+ ldesc = mdesc->list;
+ for (i = 0; i < cmds; i++) {
bytes -= ldesc->xfer_size + 1;
+ ldesc = ldesc->next_desc;
+ }
+ if (ldesc) {
+ if (residue != MDC_TRANSFER_SIZE_MASK)
+ bytes -= ldesc->xfer_size - residue;
+ else
+ bytes -= ldesc->xfer_size + 1;
+ }
}
}
spin_unlock_irqrestore(&mchan->vc.lock, flags);

198
target/linux/pistachio/patches-4.14/102-spi-img-spfi-Implement-dual-and-quad-mode.patch
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From cd2a6af51553d38072cd31699b58d16ca6176ef5 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@imgtec.com>
Date: Thu, 2 Feb 2017 16:46:14 +0000
Subject: spi: img-spfi: Implement dual and quad mode
For dual and quad modes to work the SPFI controller needs
to have information about command/address/dummy bytes in the
transaction register. This information is not relevant for
single mode, and therefore it can have any value in the
allowed range. Therefore, for any read or write transfers of less
than 8 bytes (cmd = 1 byte, addr up to 7 bytes), SPFI will be
configured, but not enabled (unless it is the last transfer in
the queue). The transfer will be enabled by the subsequent tranfer.
A pending transfer is determined by the content of the transaction
register: if command part is set and tsize is not.
This way we ensure that for dual and quad transactions
the command request size will apear in the command/address part
of the transaction register, while the data size will be in
tsize, all data being sent/received in the same transaction (as
set up in the transaction register).
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
---
drivers/spi/spi-img-spfi.c | 96 ++++++++++++++++++++++++++++++++++++++++------
1 file changed, 85 insertions(+), 11 deletions(-)
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -40,7 +40,8 @@
#define SPFI_CONTROL_SOFT_RESET BIT(11)
#define SPFI_CONTROL_SEND_DMA BIT(10)
#define SPFI_CONTROL_GET_DMA BIT(9)
-#define SPFI_CONTROL_SE BIT(8)
+#define SPFI_CONTROL_SE BIT(8)
+#define SPFI_CONTROL_TX_RX BIT(1)
#define SPFI_CONTROL_TMODE_SHIFT 5
#define SPFI_CONTROL_TMODE_MASK 0x7
#define SPFI_CONTROL_TMODE_SINGLE 0
@@ -51,6 +52,10 @@
#define SPFI_TRANSACTION 0x18
#define SPFI_TRANSACTION_TSIZE_SHIFT 16
#define SPFI_TRANSACTION_TSIZE_MASK 0xffff
+#define SPFI_TRANSACTION_CMD_SHIFT 13
+#define SPFI_TRANSACTION_CMD_MASK 0x7
+#define SPFI_TRANSACTION_ADDR_SHIFT 10
+#define SPFI_TRANSACTION_ADDR_MASK 0x7
#define SPFI_PORT_STATE 0x1c
#define SPFI_PORT_STATE_DEV_SEL_SHIFT 20
@@ -87,6 +92,7 @@
*/
#define SPFI_32BIT_FIFO_SIZE 64
#define SPFI_8BIT_FIFO_SIZE 16
+#define SPFI_DATA_REQUEST_MAX_SIZE 8
struct img_spfi {
struct device *dev;
@@ -103,6 +109,8 @@ struct img_spfi {
struct dma_chan *tx_ch;
bool tx_dma_busy;
bool rx_dma_busy;
+
+ bool complete;
};
struct img_spfi_device_data {
@@ -123,9 +131,11 @@ static inline void spfi_start(struct img
{
u32 val;
- val = spfi_readl(spfi, SPFI_CONTROL);
- val |= SPFI_CONTROL_SPFI_EN;
- spfi_writel(spfi, val, SPFI_CONTROL);
+ if (spfi->complete) {
+ val = spfi_readl(spfi, SPFI_CONTROL);
+ val |= SPFI_CONTROL_SPFI_EN;
+ spfi_writel(spfi, val, SPFI_CONTROL);
+ }
}
static inline void spfi_reset(struct img_spfi *spfi)
@@ -138,12 +148,21 @@ static int spfi_wait_all_done(struct img
{
unsigned long timeout = jiffies + msecs_to_jiffies(50);
+ if (!(spfi->complete))
+ return 0;
+
while (time_before(jiffies, timeout)) {
u32 status = spfi_readl(spfi, SPFI_INTERRUPT_STATUS);
if (status & SPFI_INTERRUPT_ALLDONETRIG) {
spfi_writel(spfi, SPFI_INTERRUPT_ALLDONETRIG,
SPFI_INTERRUPT_CLEAR);
+ /*
+ * Disable SPFI for it not to interfere with
+ * pending transactions
+ */
+ spfi_writel(spfi, spfi_readl(spfi, SPFI_CONTROL)
+ & ~SPFI_CONTROL_SPFI_EN, SPFI_CONTROL);
return 0;
}
cpu_relax();
@@ -494,9 +513,32 @@ static void img_spfi_config(struct spi_m
struct spi_transfer *xfer)
{
struct img_spfi *spfi = spi_master_get_devdata(spi->master);
- u32 val, div;
+ u32 val, div, transact;
+ bool is_pending;
/*
+ * For read or write transfers of less than 8 bytes (cmd = 1 byte,
+ * addr up to 7 bytes), SPFI will be configured, but not enabled
+ * (unless it is the last transfer in the queue).The transfer will
+ * be enabled by the subsequent transfer.
+ * A pending transfer is determined by the content of the
+ * transaction register: if command part is set and tsize
+ * is not
+ */
+ transact = spfi_readl(spfi, SPFI_TRANSACTION);
+ is_pending = ((transact >> SPFI_TRANSACTION_CMD_SHIFT) &
+ SPFI_TRANSACTION_CMD_MASK) &&
+ (!((transact >> SPFI_TRANSACTION_TSIZE_SHIFT) &
+ SPFI_TRANSACTION_TSIZE_MASK));
+
+ /* If there are no pending transactions it's OK to soft reset */
+ if (!is_pending) {
+ /* Start the transaction from a known (reset) state */
+ spfi_reset(spfi);
+ }
+
+ /*
+ * Before anything else, set up parameters.
* output = spfi_clk * (BITCLK / 512), where BITCLK must be a
* power of 2 up to 128
*/
@@ -509,20 +551,52 @@ static void img_spfi_config(struct spi_m
val |= div << SPFI_DEVICE_PARAMETER_BITCLK_SHIFT;
spfi_writel(spfi, val, SPFI_DEVICE_PARAMETER(spi->chip_select));
- spfi_writel(spfi, xfer->len << SPFI_TRANSACTION_TSIZE_SHIFT,
- SPFI_TRANSACTION);
+ if (!list_is_last(&xfer->transfer_list, &master->cur_msg->transfers) &&
+ /*
+ * For duplex mode (both the tx and rx buffers are !NULL) the
+ * CMD, ADDR, and DUMMY byte parts of the transaction register
+ * should always be 0 and therefore the pending transfer
+ * technique cannot be used.
+ */
+ (xfer->tx_buf) && (!xfer->rx_buf) &&
+ (xfer->len <= SPFI_DATA_REQUEST_MAX_SIZE) && !is_pending) {
+ transact = (1 & SPFI_TRANSACTION_CMD_MASK) <<
+ SPFI_TRANSACTION_CMD_SHIFT;
+ transact |= ((xfer->len - 1) & SPFI_TRANSACTION_ADDR_MASK) <<
+ SPFI_TRANSACTION_ADDR_SHIFT;
+ spfi->complete = false;
+ } else {
+ spfi->complete = true;
+ if (is_pending) {
+ /* Keep setup from pending transfer */
+ transact |= ((xfer->len & SPFI_TRANSACTION_TSIZE_MASK) <<
+ SPFI_TRANSACTION_TSIZE_SHIFT);
+ } else {
+ transact = ((xfer->len & SPFI_TRANSACTION_TSIZE_MASK) <<
+ SPFI_TRANSACTION_TSIZE_SHIFT);
+ }
+ }
+ spfi_writel(spfi, transact, SPFI_TRANSACTION);
val = spfi_readl(spfi, SPFI_CONTROL);
val &= ~(SPFI_CONTROL_SEND_DMA | SPFI_CONTROL_GET_DMA);
- if (xfer->tx_buf)
+ /*
+ * We set up send DMA for pending transfers also, as
+ * those are always send transfers
+ */
+ if ((xfer->tx_buf) || is_pending)
val |= SPFI_CONTROL_SEND_DMA;
- if (xfer->rx_buf)
+ if (xfer->tx_buf)
+ val |= SPFI_CONTROL_TX_RX;
+ if (xfer->rx_buf) {
val |= SPFI_CONTROL_GET_DMA;
+ val &= ~SPFI_CONTROL_TX_RX;
+ }
val &= ~(SPFI_CONTROL_TMODE_MASK << SPFI_CONTROL_TMODE_SHIFT);
- if (xfer->tx_nbits == SPI_NBITS_DUAL &&
+ if (xfer->tx_nbits == SPI_NBITS_DUAL ||
xfer->rx_nbits == SPI_NBITS_DUAL)
val |= SPFI_CONTROL_TMODE_DUAL << SPFI_CONTROL_TMODE_SHIFT;
- else if (xfer->tx_nbits == SPI_NBITS_QUAD &&
+ else if (xfer->tx_nbits == SPI_NBITS_QUAD ||
xfer->rx_nbits == SPI_NBITS_QUAD)
val |= SPFI_CONTROL_TMODE_QUAD << SPFI_CONTROL_TMODE_SHIFT;
val |= SPFI_CONTROL_SE;

27
target/linux/pistachio/patches-4.14/103-spi-img-spfi-set-device-select-bits-for-SPFI-port-st.patch
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From 145f5369510b86cd55c659388a26a0cc267f8874 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@imgtec.com>
Date: Mon, 1 Feb 2016 10:58:08 +0000
Subject: spi: img-spfi: set device select bits for SPFI port state
Even if the chip select line is not controlled by the SPFI
hardware, the device select bits need to be set to specify
the chip select line in use for the hardware to know what
parameters to use for the current transfer.
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
---
drivers/spi/spi-img-spfi.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -438,6 +438,9 @@ static int img_spfi_prepare(struct spi_m
u32 val;
val = spfi_readl(spfi, SPFI_PORT_STATE);
+ val &= ~(SPFI_PORT_STATE_DEV_SEL_MASK <<
+ SPFI_PORT_STATE_DEV_SEL_SHIFT);
+ val |= msg->spi->chip_select << SPFI_PORT_STATE_DEV_SEL_SHIFT;
if (msg->spi->mode & SPI_CPHA)
val |= SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
else

64
target/linux/pistachio/patches-4.14/104-spi-img-spfi-use-device-0-configuration-for-all-devi.patch
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From 905ee06a9966113fe51d6bad1819759cb30fd0bd Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@imgtec.com>
Date: Tue, 9 Feb 2016 10:18:31 +0000
Subject: spi: img-spfi: use device 0 configuration for all devices
Given that we control the chip select line externally
we can use only one parameter register (device 0 parameter
register) and one set of configuration bits (port configuration
bits for device 0) for all devices (all chip select lines).
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
---
drivers/spi/spi-img-spfi.c | 23 ++++++++++++++++-------
1 file changed, 16 insertions(+), 7 deletions(-)
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -437,18 +437,23 @@ static int img_spfi_prepare(struct spi_m
struct img_spfi *spfi = spi_master_get_devdata(master);
u32 val;
+ /*
+ * The chip select line is controlled externally so
+ * we can use the CS0 configuration for all devices
+ */
val = spfi_readl(spfi, SPFI_PORT_STATE);
+
+ /* 0 for device selection */
val &= ~(SPFI_PORT_STATE_DEV_SEL_MASK <<
SPFI_PORT_STATE_DEV_SEL_SHIFT);
- val |= msg->spi->chip_select << SPFI_PORT_STATE_DEV_SEL_SHIFT;
if (msg->spi->mode & SPI_CPHA)
- val |= SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
+ val |= SPFI_PORT_STATE_CK_PHASE(0);
else
- val &= ~SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
+ val &= ~SPFI_PORT_STATE_CK_PHASE(0);
if (msg->spi->mode & SPI_CPOL)
- val |= SPFI_PORT_STATE_CK_POL(msg->spi->chip_select);
+ val |= SPFI_PORT_STATE_CK_POL(0);
else
- val &= ~SPFI_PORT_STATE_CK_POL(msg->spi->chip_select);
+ val &= ~SPFI_PORT_STATE_CK_POL(0);
spfi_writel(spfi, val, SPFI_PORT_STATE);
return 0;
@@ -548,11 +553,15 @@ static void img_spfi_config(struct spi_m
div = DIV_ROUND_UP(clk_get_rate(spfi->spfi_clk), xfer->speed_hz);
div = clamp(512 / (1 << get_count_order(div)), 1, 128);
- val = spfi_readl(spfi, SPFI_DEVICE_PARAMETER(spi->chip_select));
+ /*
+ * The chip select line is controlled externally so
+ * we can use the CS0 parameters for all devices
+ */
+ val = spfi_readl(spfi, SPFI_DEVICE_PARAMETER(0));
val &= ~(SPFI_DEVICE_PARAMETER_BITCLK_MASK <<
SPFI_DEVICE_PARAMETER_BITCLK_SHIFT);
val |= div << SPFI_DEVICE_PARAMETER_BITCLK_SHIFT;
- spfi_writel(spfi, val, SPFI_DEVICE_PARAMETER(spi->chip_select));
+ spfi_writel(spfi, val, SPFI_DEVICE_PARAMETER(0));
if (!list_is_last(&xfer->transfer_list, &master->cur_msg->transfers) &&
/*

59
target/linux/pistachio/patches-4.14/105-spi-img-spfi-RX-maximum-burst-size-for-DMA-is-8.patch
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From 56466f505f58f44b69feb7eaed3b506842800456 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@imgtec.com>
Date: Tue, 1 Mar 2016 17:49:45 +0000
Subject: spi: img-spfi: RX maximum burst size for DMA is 8
The depth of the FIFOs is 16 bytes. The DMA request line is tied
to the half full/empty (depending on the use of the TX or RX FIFO)
threshold. For the TX FIFO, if you set a burst size of 8 (equal to
half the depth) the first burst goes into FIFO without any issues,
but due the latency involved (the time the data leaves the DMA
engine to the time it arrives at the FIFO), the DMA might trigger
another burst of 8. But given that there is no space for 2 additonal
bursts of 8, this would result in a failure. Therefore, we have to
keep the burst size for TX to 4 to accomodate for an extra burst.
For the read (RX) scenario, the DMA request line goes high when
there is at least 8 entries in the FIFO (half full), and we can
program the burst size to be 8 because the risk of accidental burst
does not exist. The DMA engine will not trigger another read until
the read data for all the burst it has sent out has been received.
While here, move the burst size setting outside of the if/else branches
as they have the same value for both 8 and 32 bit data widths.
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
---
drivers/spi/spi-img-spfi.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -346,12 +346,11 @@ static int img_spfi_start_dma(struct spi
if (xfer->len % 4 == 0) {
rxconf.src_addr = spfi->phys + SPFI_RX_32BIT_VALID_DATA;
rxconf.src_addr_width = 4;
- rxconf.src_maxburst = 4;
} else {
rxconf.src_addr = spfi->phys + SPFI_RX_8BIT_VALID_DATA;
rxconf.src_addr_width = 1;
- rxconf.src_maxburst = 4;
}
+ rxconf.src_maxburst = 8;
dmaengine_slave_config(spfi->rx_ch, &rxconf);
rxdesc = dmaengine_prep_slave_sg(spfi->rx_ch, xfer->rx_sg.sgl,
@@ -370,12 +369,11 @@ static int img_spfi_start_dma(struct spi
if (xfer->len % 4 == 0) {
txconf.dst_addr = spfi->phys + SPFI_TX_32BIT_VALID_DATA;
txconf.dst_addr_width = 4;
- txconf.dst_maxburst = 4;
} else {
txconf.dst_addr = spfi->phys + SPFI_TX_8BIT_VALID_DATA;
txconf.dst_addr_width = 1;
- txconf.dst_maxburst = 4;
}
+ txconf.dst_maxburst = 4;
dmaengine_slave_config(spfi->tx_ch, &txconf);
txdesc = dmaengine_prep_slave_sg(spfi->tx_ch, xfer->tx_sg.sgl,

120
target/linux/pistachio/patches-4.14/106-spi-img-spfi-finish-every-transfer-cleanly.patch
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From 5fcca3fd4b621d7b5bdeca18d36dfc6ca6cfe383 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@imgtec.com>
Date: Wed, 10 Aug 2016 11:42:26 +0100
Subject: spi: img-spfi: finish every transfer cleanly
Before this change, the interrupt status bit that signaled
the end of a tranfers was cleared in the wait_all_done
function. That functionality triggered issues for DMA
duplex transactions where the wait function was called
twice, in both the TX and RX callbacks.
In order to fix the issue, clear all interrupt data bits
at the end of a PIO transfer or at the end of both TX and RX
duplex transfers, if the transfer is not a pending tranfer
(command waiting for data). After that, the status register
is checked for new incoming data or new data requests to be
signaled. If SPFI finished cleanly, no new interrupt data
bits should be set.
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
---
drivers/spi/spi-img-spfi.c | 49 +++++++++++++++++++++++++++++++++-------------
1 file changed, 35 insertions(+), 14 deletions(-)
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -83,6 +83,14 @@
#define SPFI_INTERRUPT_SDE BIT(1)
#define SPFI_INTERRUPT_SDTRIG BIT(0)
+#define SPFI_INTERRUPT_DATA_BITS (SPFI_INTERRUPT_SDHF |\
+ SPFI_INTERRUPT_SDFUL |\
+ SPFI_INTERRUPT_GDEX32BIT |\
+ SPFI_INTERRUPT_GDHF |\
+ SPFI_INTERRUPT_GDFUL |\
+ SPFI_INTERRUPT_ALLDONETRIG |\
+ SPFI_INTERRUPT_GDEX8BIT)
+
/*
* There are four parallel FIFOs of 16 bytes each. The word buffer
* (*_32BIT_VALID_DATA) accesses all four FIFOs at once, resulting in an
@@ -144,6 +152,23 @@ static inline void spfi_reset(struct img
spfi_writel(spfi, 0, SPFI_CONTROL);
}
+static inline void spfi_finish(struct img_spfi *spfi)
+{
+ if (!(spfi->complete))
+ return;
+
+ /* Clear data bits as all transfers(TX and RX) have finished */
+ spfi_writel(spfi, SPFI_INTERRUPT_DATA_BITS, SPFI_INTERRUPT_CLEAR);
+ if (spfi_readl(spfi, SPFI_INTERRUPT_STATUS) & SPFI_INTERRUPT_DATA_BITS) {
+ dev_err(spfi->dev, "SPFI did not finish transfer cleanly.\n");
+ spfi_reset(spfi);
+ }
+ /* Disable SPFI for it not to interfere with pending transactions */
+ spfi_writel(spfi,
+ spfi_readl(spfi, SPFI_CONTROL) & ~SPFI_CONTROL_SPFI_EN,
+ SPFI_CONTROL);
+}
+
static int spfi_wait_all_done(struct img_spfi *spfi)
{
unsigned long timeout = jiffies + msecs_to_jiffies(50);
@@ -152,19 +177,9 @@ static int spfi_wait_all_done(struct img
return 0;
while (time_before(jiffies, timeout)) {
- u32 status = spfi_readl(spfi, SPFI_INTERRUPT_STATUS);
-
- if (status & SPFI_INTERRUPT_ALLDONETRIG) {
- spfi_writel(spfi, SPFI_INTERRUPT_ALLDONETRIG,
- SPFI_INTERRUPT_CLEAR);
- /*
- * Disable SPFI for it not to interfere with
- * pending transactions
- */
- spfi_writel(spfi, spfi_readl(spfi, SPFI_CONTROL)
- & ~SPFI_CONTROL_SPFI_EN, SPFI_CONTROL);
+ if (spfi_readl(spfi, SPFI_INTERRUPT_STATUS) &
+ SPFI_INTERRUPT_ALLDONETRIG)
return 0;
- }
cpu_relax();
}
@@ -296,6 +311,8 @@ static int img_spfi_start_pio(struct spi
}
ret = spfi_wait_all_done(spfi);
+ spfi_finish(spfi);
+
if (ret < 0)
return ret;
@@ -311,8 +328,10 @@ static void img_spfi_dma_rx_cb(void *dat
spin_lock_irqsave(&spfi->lock, flags);
spfi->rx_dma_busy = false;
- if (!spfi->tx_dma_busy)
+ if (!spfi->tx_dma_busy) {
+ spfi_finish(spfi);
spi_finalize_current_transfer(spfi->master);
+ }
spin_unlock_irqrestore(&spfi->lock, flags);
}
@@ -325,8 +344,10 @@ static void img_spfi_dma_tx_cb(void *dat
spin_lock_irqsave(&spfi->lock, flags);
spfi->tx_dma_busy = false;
- if (!spfi->rx_dma_busy)
+ if (!spfi->rx_dma_busy) {
+ spfi_finish(spfi);
spi_finalize_current_transfer(spfi->master);
+ }
spin_unlock_irqrestore(&spfi->lock, flags);
}

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target/linux/pistachio/patches-4.14/107-clockevents-Retry-programming-min-delta-up-to-10-tim.patch
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From b46f8c74afdd30cd52bfdcc2231470a0bab04416 Mon Sep 17 00:00:00 2001
From: James Hogan <james.hogan@imgtec.com>
Date: Fri, 22 Apr 2016 18:22:45 +0100
Subject: clockevents: Retry programming min delta up to 10 times
Under virtualisation it is possible to get unexpected latency during a
clockevent device's set_next_event() callback which can make it return
-ETIME even for a delta based on min_delta_ns.
The clockevents_program_min_delta() implementation for
CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST=n doesn't handle retries when this
happens, nor does clockevents_program_event() or its callers when force
is true (for example hrtimer_reprogram()). This can result in hangs
until the clock event device does a full period.
It isn't appropriate to use MIN_ADJUST in this case as occasional
hypervisor induced high latency will cause min_delta_ns to quickly
increase to the maximum.
Instead, borrow the retry pattern from the MIN_ADJUST case, but without
making adjustments. We retry up to 10 times before giving up.
(picked https://patchwork.kernel.org/patch/8909491/)
Signed-off-by: James Hogan <james.hogan@imgtec.com>
---
kernel/time/clockevents.c | 26 +++++++++++++++++++-------
1 file changed, 19 insertions(+), 7 deletions(-)
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -281,16 +281,28 @@ static int clockevents_program_min_delta
{
unsigned long long clc;
int64_t delta;
+ int i;
- delta = dev->min_delta_ns;
- dev->next_event = ktime_add_ns(ktime_get(), delta);
+ for (i = 0;;) {
+ delta = dev->min_delta_ns;
+ dev->next_event = ktime_add_ns(ktime_get(), delta);
- if (clockevent_state_shutdown(dev))
- return 0;
+ if (clockevent_state_shutdown(dev))
+ return 0;
- dev->retries++;
- clc = ((unsigned long long) delta * dev->mult) >> dev->shift;
- return dev->set_next_event((unsigned long) clc, dev);
+ dev->retries++;
+ clc = ((unsigned long long) delta * dev->mult) >> dev->shift;
+ if (dev->set_next_event((unsigned long) clc, dev) == 0)
+ return 0;
+
+ if (++i > 9) {
+ /*
+ * We tried 10 times to program the device with the
+ * given min_delta_ns. Get out of here.
+ */
+ return -ETIME;
+ }
+ }
}
#endif /* CONFIG_GENERIC_CLOCKEVENTS_MIN_ADJUST */

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target/linux/pistachio/patches-4.14/108-clk-pistachio-Fix-wrong-SDHost-card-speed.patch
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From 3642843a06025ec333d7e92580cf52cb8db2a652 Mon Sep 17 00:00:00 2001
From: Govindraj Raja <Govindraj.Raja@imgtec.com>
Date: Fri, 8 Jan 2016 16:36:07 +0000
Subject: clk: pistachio: Fix wrong SDHost card speed
The SDHost currently clocks the card 4x slower than it
should do, because there is fixed divide by 4 in the
sdhost wrapper that is not present in the clock tree.
To model this add a fixed divide by 4 clock node in
the SDHost clock path.
This will ensure the right clock frequency is selected when
the mmc driver tries to configure frequency on card insert.
Signed-off-by: Govindraj Raja <Govindraj.Raja@imgtec.com>
---
drivers/clk/pistachio/clk-pistachio.c | 3 ++-
include/dt-bindings/clock/pistachio-clk.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/clk/pistachio/clk-pistachio.c
+++ b/drivers/clk/pistachio/clk-pistachio.c
@@ -44,7 +44,7 @@ static struct pistachio_gate pistachio_g
GATE(CLK_AUX_ADC_INTERNAL, "aux_adc_internal", "sys_internal_div",
0x104, 22),
GATE(CLK_AUX_ADC, "aux_adc", "aux_adc_div", 0x104, 23),
- GATE(CLK_SD_HOST, "sd_host", "sd_host_div", 0x104, 24),
+ GATE(CLK_SD_HOST, "sd_host", "sd_host_div4", 0x104, 24),
GATE(CLK_BT, "bt", "bt_div", 0x104, 25),
GATE(CLK_BT_DIV4, "bt_div4", "bt_div4_div", 0x104, 26),
GATE(CLK_BT_DIV8, "bt_div8", "bt_div8_div", 0x104, 27),
@@ -54,6 +54,7 @@ static struct pistachio_gate pistachio_g
static struct pistachio_fixed_factor pistachio_ffs[] __initdata = {
FIXED_FACTOR(CLK_WIFI_DIV4, "wifi_div4", "wifi_pll", 4),
FIXED_FACTOR(CLK_WIFI_DIV8, "wifi_div8", "wifi_pll", 8),
+ FIXED_FACTOR(CLK_SDHOST_DIV4, "sd_host_div4", "sd_host_div", 4),
};
static struct pistachio_div pistachio_divs[] __initdata = {
--- a/include/dt-bindings/clock/pistachio-clk.h
+++ b/include/dt-bindings/clock/pistachio-clk.h
@@ -21,6 +21,7 @@
/* Fixed-factor clocks */
#define CLK_WIFI_DIV4 16
#define CLK_WIFI_DIV8 17
+#define CLK_SDHOST_DIV4 18
/* Gate clocks */
#define CLK_MIPS 32

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target/linux/pistachio/patches-4.14/109-MIPS-DTS-img-marduk-switch-mmc-to-1-bit-mode.patch
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From 981c1d416af45eff207227aec106381ac23aac99 Mon Sep 17 00:00:00 2001
From: Ian Pozella <Ian.Pozella@imgtec.com>
Date: Mon, 20 Feb 2017 10:00:52 +0000
Subject: MIPS: DTS: img: marduk: switch mmc to 1 bit mode
The mmc block in Pistachio allows 1 to 8 data bits to be used.
Marduk uses 4 bits allowing the upper 4 bits to be allocated
to the Mikrobus ports. However these bits are still connected
internally meaning the mmc block recieves signals on all data lines
and seems the internal HW CRC checks get corrupted by this erroneous
data.
We cannot control what data is sent on these lines because they go
to external ports. 1 bit mode does not exhibit the issue hence the
safe default is to use this. If a user knows that in their use case
they will not use the upper bits then they can set to 4 bit mode in
order to improve performance.
Also make sure that the upper 4 bits don't get allocated to the mmc
driver (the default is to assign all 8 pins) so they can be allocated
to other drivers. Allocating all 4 despite setting 1 bit mode as this
matches what is there in hardware.
Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com>
---
arch/mips/boot/dts/img/pistachio_marduk.dts | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/mips/boot/dts/img/pistachio_marduk.dts
+++ b/arch/mips/boot/dts/img/pistachio_marduk.dts
@@ -120,7 +120,7 @@
&sdhost {
status = "okay";
- bus-width = <4>;
+ bus-width = <1>;
disable-wp;
};
@@ -130,6 +130,7 @@
&pin_sdhost_data {
drive-strength = <2>;
+ pins = "mfio17", "mfio18", "mfio19", "mfio20";
};
&pwm {

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target/linux/pistachio/patches-4.14/401-mtd-nor-support-mtd-name-from-device-tree.patch
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From f32bc2aa01edcba2f2ed5db151cf183eac9ef919 Mon Sep 17 00:00:00 2001
From: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
Date: Sat, 25 Feb 2017 16:42:50 +0000
Subject: mtd: nor: support mtd name from device tree
Signed-off-by: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
---
drivers/mtd/spi-nor/spi-nor.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -2646,6 +2646,7 @@ int spi_nor_scan(struct spi_nor *nor, co
struct device *dev = nor->dev;
struct mtd_info *mtd = &nor->mtd;
struct device_node *np = spi_nor_get_flash_node(nor);
+ const char __maybe_unused *of_mtd_name = NULL;
int ret;
int i;
@@ -2721,7 +2722,12 @@ int spi_nor_scan(struct spi_nor *nor, co
spi_nor_wait_till_ready(nor);
}
- if (!mtd->name)
+#ifdef CONFIG_MTD_OF_PARTS
+ of_property_read_string(np, "linux,mtd-name", &of_mtd_name);
+#endif
+ if (of_mtd_name)
+ mtd->name = of_mtd_name;
+ else if (!mtd->name)
mtd->name = dev_name(dev);
mtd->priv = nor;
mtd->type = MTD_NORFLASH;

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target/linux/pistachio/patches-4.14/411-mtd-nand-Check-length-of-ID-before-reading-bits-per-.patch
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From 42ebff638003be18fab503b37de4ad7853244e95 Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Date: Sat, 25 Feb 2017 15:58:22 +0000
Subject: mtd: nand: Check length of ID before reading bits per cell
The table-based NAND identification currently reads the number
of bits per cell from the 3rd byte of the extended ID. This is done
for the so-called 'full ID' devices; i.e. devices that have a known
length ID.
However, if the ID length is shorter than three, there's no 3rd byte,
and so it's wrong to read the bits per cell from there. Fix this by
adding a check for the ID length.
(picked from http://lists.infradead.org/pipermail/linux-mtd/2014-December/056764.html)
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
---
drivers/mtd/nand/nand_base.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3803,7 +3803,8 @@ static bool find_full_id_nand(struct nan
mtd->erasesize = type->erasesize;
mtd->oobsize = type->oobsize;
- chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]);
+ if (type->id_len > 2)
+ chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]);
chip->chipsize = (uint64_t)type->chipsize << 20;
chip->options |= type->options;
chip->ecc_strength_ds = NAND_ECC_STRENGTH(type);

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target/linux/pistachio/patches-4.14/412-mtd-nand-Add-JEDEC-manufacturer-ID-for-Gigadevice.patch
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From a4bc33b205fd9b1db862f1e45173dba57b0fa57f Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Date: Sat, 25 Feb 2017 15:43:09 +0000
Subject: mtd: nand: Add JEDEC manufacturer ID for Gigadevice
This commit adds Gigadevice to the list of manufacturer ID and name strings.
(picked from http://lists.infradead.org/pipermail/linux-mtd/2014-December/056765.html)
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
---
drivers/mtd/nand/nand_ids.c | 1 +
include/linux/mtd/rawnand.h | 1 +
2 files changed, 2 insertions(+)
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -184,6 +184,7 @@ static const struct nand_manufacturer na
{NAND_MFR_SANDISK, "SanDisk"},
{NAND_MFR_INTEL, "Intel"},
{NAND_MFR_ATO, "ATO"},
+ {NAND_MFR_GIGADEVICE, "Gigadevice"},
{NAND_MFR_WINBOND, "Winbond"},
};
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1016,6 +1016,7 @@ static inline void *nand_get_manufacture
#define NAND_MFR_SANDISK 0x45
#define NAND_MFR_INTEL 0x89
#define NAND_MFR_ATO 0x9b
+#define NAND_MFR_GIGADEVICE 0xc8
#define NAND_MFR_WINBOND 0xef

706
target/linux/pistachio/patches-4.14/413-mtd-Introduce-SPI-NAND-framework.patch
Unescape Escape View File

@ -0,0 +1,706 @@
From 082a89a78e29b15008284df90441747cb742f149 Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Date: Tue, 2 Dec 2014 09:58:52 -0300
Subject: mtd: Introduce SPI NAND framework
Add a new framework, to support SPI NAND devices. The framework registers
a NAND chip and handles the generic SPI NAND protocol, calling device-specific
hooks for each SPI NAND command.
The following is the stack design, from userspace to hardware. This commit
adds the "SPI NAND core" layer.
Userspace
------------------
MTD
------------------
NAND core
------------------
SPI NAND core
------------------
SPI NAND device
------------------
SPI core
------------------
SPI master
------------------
Hardware
(based on http://lists.infradead.org/pipermail/linux-mtd/2014-December/056763.html)
Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com>
---
drivers/mtd/Kconfig | 2 +
drivers/mtd/Makefile | 1 +
drivers/mtd/spi-nand/Kconfig | 7 +
drivers/mtd/spi-nand/Makefile | 1 +
drivers/mtd/spi-nand/spi-nand-base.c | 566 +++++++++++++++++++++++++++++++++++
include/linux/mtd/spi-nand.h | 54 ++++
6 files changed, 631 insertions(+)
create mode 100644 drivers/mtd/spi-nand/Kconfig
create mode 100644 drivers/mtd/spi-nand/Makefile
create mode 100644 drivers/mtd/spi-nand/spi-nand-base.c
create mode 100644 include/linux/mtd/spi-nand.h
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -373,6 +373,8 @@ source "drivers/mtd/onenand/Kconfig"
source "drivers/mtd/lpddr/Kconfig"
+source "drivers/mtd/spi-nand/Kconfig"
+
source "drivers/mtd/spi-nor/Kconfig"
source "drivers/mtd/ubi/Kconfig"
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -37,5 +37,6 @@ inftl-objs := inftlcore.o inftlmount.o
obj-y += chips/ lpddr/ maps/ devices/ nand/ onenand/ tests/
+obj-$(CONFIG_MTD_SPI_NAND) += spi-nand/
obj-$(CONFIG_MTD_SPI_NOR) += spi-nor/
obj-$(CONFIG_MTD_UBI) += ubi/
--- /dev/null
+++ b/drivers/mtd/spi-nand/Kconfig
@@ -0,0 +1,7 @@
+menuconfig MTD_SPI_NAND
+ tristate "SPI NAND device support"
+ depends on MTD
+ select MTD_NAND
+ help
+ This is the framework for the SPI NAND.
+
--- /dev/null
+++ b/drivers/mtd/spi-nand/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_MTD_SPI_NAND) += spi-nand-base.o
--- /dev/null
+++ b/drivers/mtd/spi-nand/spi-nand-base.c
@@ -0,0 +1,566 @@
+/*
+ * Copyright (C) 2014 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * Notes:
+ * 1. Erase and program operations need to call write_enable() first,
+ * to clear the enable bit. This bit is cleared automatically after
+ * the erase or program operation.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/spi-nand.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+/* Registers common to all devices */
+#define SPI_NAND_LOCK_REG 0xa0
+#define SPI_NAND_PROT_UNLOCK_ALL 0x0
+
+#define SPI_NAND_FEATURE_REG 0xb0
+#define SPI_NAND_ECC_EN BIT(4)
+#define SPI_NAND_QUAD_EN BIT(0)
+
+#define SPI_NAND_STATUS_REG 0xc0
+#define SPI_NAND_STATUS_REG_ECC_MASK 0x3
+#define SPI_NAND_STATUS_REG_ECC_SHIFT 4
+#define SPI_NAND_STATUS_REG_PROG_FAIL BIT(3)
+#define SPI_NAND_STATUS_REG_ERASE_FAIL BIT(2)
+#define SPI_NAND_STATUS_REG_WREN BIT(1)
+#define SPI_NAND_STATUS_REG_BUSY BIT(0)
+
+#define SPI_NAND_CMD_BUF_LEN 8
+
+/* Rewind and fill the buffer with 0xff */
+static void spi_nand_clear_buffer(struct spi_nand *snand)
+{
+ snand->buf_start = 0;
+ memset(snand->data_buf, 0xff, snand->buf_size);
+}
+
+static int spi_nand_enable_ecc(struct spi_nand *snand)
+{
+ int ret;
+
+ ret = snand->read_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+
+ snand->buf[0] |= SPI_NAND_ECC_EN;
+ ret = snand->write_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+ snand->ecc = true;
+
+ return 0;
+}
+
+static int spi_nand_disable_ecc(struct spi_nand *snand)
+{
+ int ret;
+
+ ret = snand->read_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+
+ snand->buf[0] &= ~SPI_NAND_ECC_EN;
+ ret = snand->write_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+ snand->ecc = false;
+
+ return 0;
+}
+
+static int spi_nand_enable_quad(struct spi_nand *snand)
+{
+ int ret;
+
+ ret = snand->read_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+
+ snand->buf[0] |= SPI_NAND_QUAD_EN;
+ ret = snand->write_reg(snand, SPI_NAND_FEATURE_REG, snand->buf);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+/*
+ * Wait until the status register busy bit is cleared.
+ * Returns a negatie errno on error or time out, and a non-negative status
+ * value if the device is ready.
+ */
+static int spi_nand_wait_till_ready(struct spi_nand *snand)
+{
+ unsigned long deadline = jiffies + msecs_to_jiffies(100);
+ bool timeout = false;
+ int ret;
+
+ /*
+ * Perhaps we should set a different timeout for each
+ * operation (reset, read, write, erase).
+ */
+ while (!timeout) {
+ if (time_after_eq(jiffies, deadline))
+ timeout = true;
+
+ ret = snand->read_reg(snand, SPI_NAND_STATUS_REG, snand->buf);
+ if (ret < 0) {
+ dev_err(snand->dev, "error reading status register\n");
+ return ret;
+ } else if (!(snand->buf[0] & SPI_NAND_STATUS_REG_BUSY)) {
+ return snand->buf[0];
+ }
+
+ cond_resched();
+ }
+
+ dev_err(snand->dev, "operation timed out\n");
+
+ return -ETIMEDOUT;
+}
+
+static int spi_nand_reset(struct spi_nand *snand)
+{
+ int ret;
+
+ ret = snand->reset(snand);
+ if (ret < 0) {
+ dev_err(snand->dev, "reset command failed\n");
+ return ret;
+ }
+
+ /*
+ * The NAND core won't wait after a device reset, so we need
+ * to do that here.
+ */
+ ret = spi_nand_wait_till_ready(snand);
+ if (ret < 0)
+ return ret;
+ return 0;
+}
+
+static int spi_nand_status(struct spi_nand *snand)
+{
+ int ret, status;
+
+ ret = snand->read_reg(snand, SPI_NAND_STATUS_REG, snand->buf);
+ if (ret < 0) {
+ dev_err(snand->dev, "error reading status register\n");
+ return ret;
+ }
+ status = snand->buf[0];
+
+ /* Convert this into standard NAND_STATUS values */
+ if (status & SPI_NAND_STATUS_REG_BUSY)
+ snand->buf[0] = 0;
+ else
+ snand->buf[0] = NAND_STATUS_READY;
+
+ if (status & SPI_NAND_STATUS_REG_PROG_FAIL ||
+ status & SPI_NAND_STATUS_REG_ERASE_FAIL)
+ snand->buf[0] |= NAND_STATUS_FAIL;
+
+ /*
+ * Since we unlock the entire device at initialization, unconditionally
+ * set the WP bit to indicate it's not protected.
+ */
+ snand->buf[0] |= NAND_STATUS_WP;
+ return 0;
+}
+
+static int spi_nand_erase(struct spi_nand *snand, int page_addr)
+{
+ int ret;
+
+ ret = snand->write_enable(snand);
+ if (ret < 0) {
+ dev_err(snand->dev, "write enable command failed\n");
+ return ret;
+ }
+
+ ret = snand->block_erase(snand, page_addr);
+ if (ret < 0) {
+ dev_err(snand->dev, "block erase command failed\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int spi_nand_write(struct spi_nand *snand)
+{
+ int ret;
+
+ /* Enable quad mode */
+ ret = spi_nand_enable_quad(snand);
+ if (ret) {
+ dev_err(snand->dev, "error %d enabling quad mode\n", ret);
+ return ret;
+ }
+ /* Store the page to cache */
+ ret = snand->store_cache(snand, 0, snand->buf_size, snand->data_buf);
+ if (ret < 0) {
+ dev_err(snand->dev, "error %d storing page 0x%x to cache\n",
+ ret, snand->page_addr);
+ return ret;
+ }
+
+ ret = snand->write_enable(snand);
+ if (ret < 0) {
+ dev_err(snand->dev, "write enable command failed\n");
+ return ret;
+ }
+
+ /* Get page from the device cache into our internal buffer */
+ ret = snand->write_page(snand, snand->page_addr);
+ if (ret < 0) {
+ dev_err(snand->dev, "error %d reading page 0x%x from cache\n",
+ ret, snand->page_addr);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int spi_nand_read_id(struct spi_nand *snand)
+{
+ int ret;
+
+ ret = snand->read_id(snand, snand->data_buf);
+ if (ret < 0) {
+ dev_err(snand->dev, "error %d reading ID\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+static int spi_nand_read_page(struct spi_nand *snand, unsigned int page_addr,
+ unsigned int page_offset, size_t length)
+{
+ unsigned int corrected = 0, ecc_error = 0;
+ int ret;
+
+ /* Load a page into the cache register */
+ ret = snand->load_page(snand, page_addr);
+ if (ret < 0) {
+ dev_err(snand->dev, "error %d loading page 0x%x to cache\n",
+ ret, page_addr);
+ return ret;
+ }
+
+ ret = spi_nand_wait_till_ready(snand);
+ if (ret < 0)
+ return ret;
+
+ if (snand->ecc) {
+ snand->get_ecc_status(ret, &corrected, &ecc_error);
+ snand->bitflips = corrected;
+
+ /*
+ * If there's an ECC error, print a message and notify MTD
+ * about it. Then complete the read, to load actual data on
+ * the buffer (instead of the status result).
+ */
+ if (ecc_error) {
+ dev_err(snand->dev,
+ "internal ECC error reading page 0x%x\n",
+ page_addr);
+ snand->nand_chip.mtd.ecc_stats.failed++;
+ } else {
+ snand->nand_chip.mtd.ecc_stats.corrected += corrected;
+ }
+ }
+
+ /* Enable quad mode */
+ ret = spi_nand_enable_quad(snand);
+ if (ret) {
+ dev_err(snand->dev, "error %d enabling quad mode\n", ret);
+ return ret;
+ }
+ /* Get page from the device cache into our internal buffer */
+ ret = snand->read_cache(snand, page_offset, length, snand->data_buf);
+ if (ret < 0) {
+ dev_err(snand->dev, "error %d reading page 0x%x from cache\n",
+ ret, page_addr);
+ return ret;
+ }
+ return 0;
+}
+
+static u8 spi_nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct spi_nand *snand = nand_get_controller_data(chip);
+ char val = 0xff;
+
+ if (snand->buf_start < snand->buf_size)
+ val = snand->data_buf[snand->buf_start++];
+ return val;
+}
+
+static void spi_nand_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct spi_nand *snand = nand_get_controller_data(chip);
+ size_t n = min_t(size_t, len, snand->buf_size - snand->buf_start);
+
+ memcpy(snand->data_buf + snand->buf_start, buf, n);
+ snand->buf_start += n;
+}
+
+static void spi_nand_read_buf(struct mtd_info *mtd, u8 *buf, int len)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct spi_nand *snand = nand_get_controller_data(chip);
+ size_t n = min_t(size_t, len, snand->buf_size - snand->buf_start);
+
+ memcpy(buf, snand->data_buf + snand->buf_start, n);
+ snand->buf_start += n;
+}
+
+static int spi_nand_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf, int oob_required,
+ int page)
+{
+ chip->write_buf(mtd, buf, mtd->writesize);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
+}
+
+static int spi_nand_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int oob_required,
+ int page)
+{
+ struct spi_nand *snand = nand_get_controller_data(chip);
+
+ chip->read_buf(mtd, buf, mtd->writesize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return snand->bitflips;
+}
+
+static int spi_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *chip)
+{
+ struct spi_nand *snand = nand_get_controller_data(chip);
+ int ret;
+
+ ret = spi_nand_wait_till_ready(snand);
+
+ if (ret < 0) {
+ return NAND_STATUS_FAIL;
+ } else if (ret & SPI_NAND_STATUS_REG_PROG_FAIL) {
+ dev_err(snand->dev, "page program failed\n");
+ return NAND_STATUS_FAIL;
+ } else if (ret & SPI_NAND_STATUS_REG_ERASE_FAIL) {
+ dev_err(snand->dev, "block erase failed\n");
+ return NAND_STATUS_FAIL;
+ }
+
+ return NAND_STATUS_READY;
+}
+
+static void spi_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
+ int column, int page_addr)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct spi_nand *snand = nand_get_controller_data(chip);
+
+ /*
+ * In case there's any unsupported command, let's make sure
+ * we don't keep garbage around in the buffer.
+ */
+ if (command != NAND_CMD_PAGEPROG) {
+ spi_nand_clear_buffer(snand);
+ snand->page_addr = 0;
+ }
+
+ switch (command) {
+ case NAND_CMD_READ0:
+ spi_nand_read_page(snand, page_addr, 0, mtd->writesize);
+ break;
+ case NAND_CMD_READOOB:
+ spi_nand_disable_ecc(snand);
+ spi_nand_read_page(snand, page_addr, mtd->writesize,
+ mtd->oobsize);
+ spi_nand_enable_ecc(snand);
+ break;
+ case NAND_CMD_READID:
+ spi_nand_read_id(snand);
+ break;
+ case NAND_CMD_ERASE1:
+ spi_nand_erase(snand, page_addr);
+ break;
+ case NAND_CMD_ERASE2:
+ /* There's nothing to do here, as the erase is one-step */
+ break;
+ case NAND_CMD_SEQIN:
+ snand->buf_start = column;
+ snand->page_addr = page_addr;
+ break;
+ case NAND_CMD_PAGEPROG:
+ spi_nand_write(snand);
+ break;
+ case NAND_CMD_STATUS:
+ spi_nand_status(snand);
+ break;
+ case NAND_CMD_RESET:
+ spi_nand_reset(snand);
+ break;
+ default:
+ dev_err(&mtd->dev, "unknown command 0x%x\n", command);
+ }
+}
+
+static void spi_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+ /* We need this to override the default */
+}
+
+int spi_nand_check(struct spi_nand *snand)
+{
+ if (!snand->dev)
+ return -ENODEV;
+ if (!snand->read_cache)
+ return -ENODEV;
+ if (!snand->load_page)
+ return -ENODEV;
+ if (!snand->store_cache)
+ return -ENODEV;
+ if (!snand->write_page)
+ return -ENODEV;
+ if (!snand->write_reg)
+ return -ENODEV;
+ if (!snand->read_reg)
+ return -ENODEV;
+ if (!snand->block_erase)
+ return -ENODEV;
+ if (!snand->reset)
+ return -ENODEV;
+ if (!snand->write_enable)
+ return -ENODEV;
+ if (!snand->write_disable)
+ return -ENODEV;
+ if (!snand->get_ecc_status)
+ return -ENODEV;
+ return 0;
+}
+
+int spi_nand_register(struct spi_nand *snand, struct nand_flash_dev *flash_ids)
+{
+ struct nand_chip *chip = &snand->nand_chip;
+ struct mtd_info *mtd = nand_to_mtd(chip);
+ struct device_node *np = snand->dev->of_node;
+ const char __maybe_unused *of_mtd_name = NULL;
+ int ret;
+
+ /* Let's check all the hooks are in-place so we don't panic later */
+ ret = spi_nand_check(snand);
+ if (ret)
+ return ret;
+
+ nand_set_controller_data(chip, snand);
+ nand_set_flash_node(chip, np);
+ chip->read_buf = spi_nand_read_buf;
+ chip->write_buf = spi_nand_write_buf;
+ chip->read_byte = spi_nand_read_byte;
+ chip->cmdfunc = spi_nand_cmdfunc;
+ chip->waitfunc = spi_nand_waitfunc;
+ chip->select_chip = spi_nand_select_chip;
+ chip->options |= NAND_NO_SUBPAGE_WRITE;
+ chip->bits_per_cell = 1;
+
+ mtd_set_ooblayout(mtd, snand->ooblayout);
+ chip->ecc.read_page = spi_nand_read_page_hwecc;
+ chip->ecc.write_page = spi_nand_write_page_hwecc;
+ chip->ecc.mode = NAND_ECC_HW;
+
+ if (of_property_read_bool(np, "nand-on-flash-bbt"))
+ chip->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
+
+#ifdef CONFIG_MTD_OF_PARTS
+ of_property_read_string(np, "linux,mtd-name", &of_mtd_name);
+#endif
+ if (of_mtd_name)
+ mtd->name = of_mtd_name;
+ else
+ mtd->name = snand->name;
+ mtd->owner = THIS_MODULE;
+
+ /* Allocate buffer to be used to read/write the internal registers */
+ snand->buf = kmalloc(SPI_NAND_CMD_BUF_LEN, GFP_KERNEL);
+ if (!snand->buf)
+ return -ENOMEM;
+
+ /* This is enabled at device power up but we'd better make sure */
+ ret = spi_nand_enable_ecc(snand);
+ if (ret)
+ return ret;
+
+ /* Preallocate buffer for flash identification (NAND_CMD_READID) */
+ snand->buf_size = SPI_NAND_CMD_BUF_LEN;
+ snand->data_buf = kmalloc(snand->buf_size, GFP_KERNEL);
+
+ ret = nand_scan_ident(mtd, 1, flash_ids);
+ if (ret)
+ return ret;
+
+ /*
+ * SPI NAND has on-die ECC, which means we can correct as much as
+ * we are required to. This must be done after identification of
+ * the device.
+ */
+ chip->ecc.strength = chip->ecc_strength_ds;
+ chip->ecc.size = chip->ecc_step_ds;
+
+ /*
+ * Unlock all the device before calling nand_scan_tail. This is needed
+ * in case the in-flash bad block table needs to be created.
+ * We could override __nand_unlock(), but since it's not currently used
+ * by the NAND core we call this explicitly.
+ */
+ snand->buf[0] = SPI_NAND_PROT_UNLOCK_ALL;
+ ret = snand->write_reg(snand, SPI_NAND_LOCK_REG, snand->buf);
+ if (ret)
+ return ret;
+
+ /* Free the buffer and allocate a good one, to fit a page plus OOB */
+ kfree(snand->data_buf);
+
+ snand->buf_size = mtd->writesize + mtd->oobsize;
+ snand->data_buf = kmalloc(snand->buf_size, GFP_KERNEL);
+ if (!snand->data_buf)
+ return -ENOMEM;
+
+ ret = nand_scan_tail(mtd);
+ if (ret)
+ return ret;
+
+ return mtd_device_register(mtd, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(spi_nand_register);
+
+void spi_nand_unregister(struct spi_nand *snand)
+{
+ kfree(snand->buf);
+ kfree(snand->data_buf);
+}
+EXPORT_SYMBOL_GPL(spi_nand_unregister);
+
+MODULE_AUTHOR("Ezequiel Garcia <ezequiel.garcia@imgtec.com>");
+MODULE_DESCRIPTION("Framework for SPI NAND");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+++ b/include/linux/mtd/spi-nand.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2014 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#ifndef __LINUX_MTD_SPI_NAND_H
+#define __LINUX_MTD_SPI_NAND_H
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/rawnand.h>
+
+struct spi_nand {
+ struct nand_chip nand_chip;
+ struct device *dev;
+ const char *name;
+
+ u8 *buf, *data_buf;
+ size_t buf_size;
+ off_t buf_start;
+ unsigned int page_addr;
+ unsigned int bitflips;
+ bool ecc;
+ struct mtd_ooblayout_ops *ooblayout;
+
+ int (*reset)(struct spi_nand *snand);
+ int (*read_id)(struct spi_nand *snand, u8 *buf);
+
+ int (*write_disable)(struct spi_nand *snand);
+ int (*write_enable)(struct spi_nand *snand);
+
+ int (*read_reg)(struct spi_nand *snand, u8 opcode, u8 *buf);
+ int (*write_reg)(struct spi_nand *snand, u8 opcode, u8 *buf);
+ void (*get_ecc_status)(unsigned int status,
+ unsigned int *corrected,
+ unsigned int *ecc_errors);
+
+ int (*store_cache)(struct spi_nand *snand, unsigned int page_offset,
+ size_t length, u8 *write_buf);
+ int (*write_page)(struct spi_nand *snand, unsigned int page_addr);
+ int (*load_page)(struct spi_nand *snand, unsigned int page_addr);
+ int (*read_cache)(struct spi_nand *snand, unsigned int page_offset,
+ size_t length, u8 *read_buf);
+ int (*block_erase)(struct spi_nand *snand, unsigned int page_addr);
+
+ void *priv;
+};
+
+int spi_nand_register(struct spi_nand *snand, struct nand_flash_dev *flash_ids);
+void spi_nand_unregister(struct spi_nand *snand);
+
+#endif

524
target/linux/pistachio/patches-4.14/414-mtd-spi-nand-Support-Gigadevice-GD5F.patch
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@ -0,0 +1,524 @@
From 7723e59d483a883578115a73eb87eb7fff0ff724 Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Date: Tue, 28 Feb 2017 10:37:24 +0000
Subject: mtd: spi-nand: Support Gigadevice GD5F
This commit uses the recently introduced SPI NAND framework to support
the Gigadevice GD5F serial NAND device.
The current support includes:
* Page read and page program operations (using on-die ECC)
* Page out-of-band read
* Erase
* Reset
* Device status retrieval
* Device ID retrieval
(based on http://lists.infradead.org/pipermail/linux-mtd/2014-December/056769.html)
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com>
---
drivers/mtd/spi-nand/Kconfig | 10 +
drivers/mtd/spi-nand/Makefile | 1 +
drivers/mtd/spi-nand/spi-nand-device.c | 472 +++++++++++++++++++++++++++++++++
3 files changed, 483 insertions(+)
create mode 100644 drivers/mtd/spi-nand/spi-nand-device.c
--- a/drivers/mtd/spi-nand/Kconfig
+++ b/drivers/mtd/spi-nand/Kconfig
@@ -5,3 +5,13 @@ menuconfig MTD_SPI_NAND
help
This is the framework for the SPI NAND.
+if MTD_SPI_NAND
+
+config MTD_SPI_NAND_DEVICES
+ tristate "Support for SPI NAND devices"
+ default y
+ depends on MTD_SPI_NAND
+ help
+ Select this option if you require support for SPI NAND devices.
+
+endif # MTD_SPI_NAND
--- a/drivers/mtd/spi-nand/Makefile
+++ b/drivers/mtd/spi-nand/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_MTD_SPI_NAND) += spi-nand-base.o
+obj-$(CONFIG_MTD_SPI_NAND_DEVICES) += spi-nand-device.o
--- /dev/null
+++ b/drivers/mtd/spi-nand/spi-nand-device.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright (C) 2014 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * Notes:
+ * 1. We avoid using a stack-allocated buffer for SPI messages. Using
+ * a kmalloced buffer is probably better, given we shouldn't assume
+ * any particular usage by SPI core.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/spi-nand.h>
+#include <linux/sizes.h>
+#include <linux/spi/spi.h>
+
+/* SPI NAND commands */
+#define SPI_NAND_WRITE_ENABLE 0x06
+#define SPI_NAND_WRITE_DISABLE 0x04
+#define SPI_NAND_GET_FEATURE 0x0f
+#define SPI_NAND_SET_FEATURE 0x1f
+#define SPI_NAND_PAGE_READ 0x13
+#define SPI_NAND_READ_CACHE 0x03
+#define SPI_NAND_FAST_READ_CACHE 0x0b
+#define SPI_NAND_READ_CACHE_X2 0x3b
+#define SPI_NAND_READ_CACHE_X4 0x6b
+#define SPI_NAND_READ_CACHE_DUAL_IO 0xbb
+#define SPI_NAND_READ_CACHE_QUAD_IO 0xeb
+#define SPI_NAND_READ_ID 0x9f
+#define SPI_NAND_PROGRAM_LOAD 0x02
+#define SPI_NAND_PROGRAM_LOAD4 0x32
+#define SPI_NAND_PROGRAM_EXEC 0x10
+#define SPI_NAND_PROGRAM_LOAD_RANDOM 0x84
+#define SPI_NAND_PROGRAM_LOAD_RANDOM4 0xc4
+#define SPI_NAND_BLOCK_ERASE 0xd8
+#define SPI_NAND_RESET 0xff
+
+#define SPI_NAND_GD5F_READID_LEN 2
+
+#define SPI_NAND_GD5F_ECC_MASK (BIT(0) | BIT(1) | BIT(2))
+#define SPI_NAND_GD5F_ECC_UNCORR (BIT(0) | BIT(1) | BIT(2))
+#define SPI_NAND_GD5F_ECC_SHIFT 4
+
+static int spi_nand_gd5f_ooblayout_256_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ if (section)
+ return -ERANGE;
+
+ oobregion->offset = 128;
+ oobregion->length = 128;
+
+ return 0;
+}
+
+static int spi_nand_gd5f_ooblayout_256_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ if (section)
+ return -ERANGE;
+
+ oobregion->offset = 1;
+ oobregion->length = 127;
+
+ return 0;
+}
+
+static const struct mtd_ooblayout_ops spi_nand_gd5f_oob_256_ops = {
+ .ecc = spi_nand_gd5f_ooblayout_256_ecc,
+ .free = spi_nand_gd5f_ooblayout_256_free,
+};
+
+static struct nand_flash_dev spi_nand_flash_ids[] = {
+ {
+ .name = "SPI NAND 512MiB 3,3V",
+ .id = { NAND_MFR_GIGADEVICE, 0xb4 },
+ .chipsize = 512,
+ .pagesize = SZ_4K,
+ .erasesize = SZ_256K,
+ .id_len = 2,
+ .oobsize = 256,
+ .ecc.strength_ds = 8,
+ .ecc.step_ds = 512,
+ },
+ {
+ .name = "SPI NAND 512MiB 1,8V",
+ .id = { NAND_MFR_GIGADEVICE, 0xa4 },
+ .chipsize = 512,
+ .pagesize = SZ_4K,
+ .erasesize = SZ_256K,
+ .id_len = 2,
+ .oobsize = 256,
+ .ecc.strength_ds = 8,
+ .ecc.step_ds = 512,
+ },
+};
+
+enum spi_nand_device_variant {
+ SPI_NAND_GENERIC,
+ SPI_NAND_GD5F,
+};
+
+struct spi_nand_device_cmd {
+
+ /*
+ * Command and address. I/O errors have been observed if a
+ * separate spi_transfer is used for command and address,
+ * so keep them together.
+ */
+ u32 n_cmd;
+ u8 cmd[5];
+
+ /* Tx data */
+ u32 n_tx;
+ u8 *tx_buf;
+
+ /* Rx data */
+ u32 n_rx;
+ u8 *rx_buf;
+ u8 rx_nbits;
+ u8 tx_nbits;
+};
+
+struct spi_nand_device {
+ struct spi_nand spi_nand;
+ struct spi_device *spi;
+
+ struct spi_nand_device_cmd cmd;
+};
+
+static int spi_nand_send_command(struct spi_device *spi,
+ struct spi_nand_device_cmd *cmd)
+{
+ struct spi_message message;
+ struct spi_transfer x[2];
+
+ if (!cmd->n_cmd) {
+ dev_err(&spi->dev, "cannot send an empty command\n");
+ return -EINVAL;
+ }
+
+ if (cmd->n_tx && cmd->n_rx) {
+ dev_err(&spi->dev, "cannot send and receive data at the same time\n");
+ return -EINVAL;
+ }
+
+ spi_message_init(&message);
+ memset(x, 0, sizeof(x));
+
+ /* Command and address */
+ x[0].len = cmd->n_cmd;
+ x[0].tx_buf = cmd->cmd;
+ x[0].tx_nbits = cmd->tx_nbits;
+ spi_message_add_tail(&x[0], &message);
+
+ /* Data to be transmitted */
+ if (cmd->n_tx) {
+ x[1].len = cmd->n_tx;
+ x[1].tx_buf = cmd->tx_buf;
+ x[1].tx_nbits = cmd->tx_nbits;
+ spi_message_add_tail(&x[1], &message);
+ }
+
+ /* Data to be received */
+ if (cmd->n_rx) {
+ x[1].len = cmd->n_rx;
+ x[1].rx_buf = cmd->rx_buf;
+ x[1].rx_nbits = cmd->rx_nbits;
+ spi_message_add_tail(&x[1], &message);
+ }
+
+ return spi_sync(spi, &message);
+}
+
+static int spi_nand_device_reset(struct spi_nand *snand)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 1;
+ cmd->cmd[0] = SPI_NAND_RESET;
+
+ dev_dbg(snand->dev, "%s\n", __func__);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_read_reg(struct spi_nand *snand, u8 opcode, u8 *buf)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 2;
+ cmd->cmd[0] = SPI_NAND_GET_FEATURE;
+ cmd->cmd[1] = opcode;
+ cmd->n_rx = 1;
+ cmd->rx_buf = buf;
+
+ dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_write_reg(struct spi_nand *snand, u8 opcode, u8 *buf)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 2;
+ cmd->cmd[0] = SPI_NAND_SET_FEATURE;
+ cmd->cmd[1] = opcode;
+ cmd->n_tx = 1;
+ cmd->tx_buf = buf;
+
+ dev_dbg(snand->dev, "%s: reg 0%x\n", __func__, opcode);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_write_enable(struct spi_nand *snand)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 1;
+ cmd->cmd[0] = SPI_NAND_WRITE_ENABLE;
+
+ dev_dbg(snand->dev, "%s\n", __func__);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_write_disable(struct spi_nand *snand)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 1;
+ cmd->cmd[0] = SPI_NAND_WRITE_DISABLE;
+
+ dev_dbg(snand->dev, "%s\n", __func__);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_write_page(struct spi_nand *snand,
+ unsigned int page_addr)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 4;
+ cmd->cmd[0] = SPI_NAND_PROGRAM_EXEC;
+ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
+ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
+ cmd->cmd[3] = (u8)(page_addr & 0xff);
+
+ dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_store_cache(struct spi_nand *snand,
+ unsigned int page_offset, size_t length,
+ u8 *write_buf)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+ struct spi_device *spi = snand_dev->spi;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 3;
+ cmd->cmd[0] = spi->mode & SPI_TX_QUAD ? SPI_NAND_PROGRAM_LOAD4 :
+ SPI_NAND_PROGRAM_LOAD;
+ cmd->cmd[1] = (u8)((page_offset & 0xff00) >> 8);
+ cmd->cmd[2] = (u8)(page_offset & 0xff);
+ cmd->n_tx = length;
+ cmd->tx_buf = write_buf;
+ cmd->tx_nbits = spi->mode & SPI_TX_QUAD ? 4 : 1;
+
+ dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_load_page(struct spi_nand *snand,
+ unsigned int page_addr)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 4;
+ cmd->cmd[0] = SPI_NAND_PAGE_READ;
+ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
+ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
+ cmd->cmd[3] = (u8)(page_addr & 0xff);
+
+ dev_dbg(snand->dev, "%s: page 0x%x\n", __func__, page_addr);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_read_cache(struct spi_nand *snand,
+ unsigned int page_offset, size_t length,
+ u8 *read_buf)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+ struct spi_device *spi = snand_dev->spi;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ if ((spi->mode & SPI_RX_DUAL) || (spi->mode & SPI_RX_QUAD))
+ cmd->n_cmd = 5;
+ else
+ cmd->n_cmd = 4;
+ cmd->cmd[0] = (spi->mode & SPI_RX_QUAD) ? SPI_NAND_READ_CACHE_X4 :
+ ((spi->mode & SPI_RX_DUAL) ? SPI_NAND_READ_CACHE_X2 :
+ SPI_NAND_READ_CACHE);
+ cmd->cmd[1] = 0; /* dummy byte */
+ cmd->cmd[2] = (u8)((page_offset & 0xff00) >> 8);
+ cmd->cmd[3] = (u8)(page_offset & 0xff);
+ cmd->cmd[4] = 0; /* dummy byte */
+ cmd->n_rx = length;
+ cmd->rx_buf = read_buf;
+ cmd->rx_nbits = (spi->mode & SPI_RX_QUAD) ? 4 :
+ ((spi->mode & SPI_RX_DUAL) ? 2 : 1);
+
+ dev_dbg(snand->dev, "%s: offset 0x%x\n", __func__, page_offset);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_device_block_erase(struct spi_nand *snand,
+ unsigned int page_addr)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 4;
+ cmd->cmd[0] = SPI_NAND_BLOCK_ERASE;
+ cmd->cmd[1] = (u8)((page_addr & 0xff0000) >> 16);
+ cmd->cmd[2] = (u8)((page_addr & 0xff00) >> 8);
+ cmd->cmd[3] = (u8)(page_addr & 0xff);
+
+ dev_dbg(snand->dev, "%s: block 0x%x\n", __func__, page_addr);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static int spi_nand_gd5f_read_id(struct spi_nand *snand, u8 *buf)
+{
+ struct spi_nand_device *snand_dev = snand->priv;
+ struct spi_nand_device_cmd *cmd = &snand_dev->cmd;
+
+ memset(cmd, 0, sizeof(struct spi_nand_device_cmd));
+ cmd->n_cmd = 1;
+ cmd->cmd[0] = SPI_NAND_READ_ID;
+ cmd->n_rx = SPI_NAND_GD5F_READID_LEN;
+ cmd->rx_buf = buf;
+
+ dev_dbg(snand->dev, "%s\n", __func__);
+
+ return spi_nand_send_command(snand_dev->spi, cmd);
+}
+
+static void spi_nand_gd5f_ecc_status(unsigned int status,
+ unsigned int *corrected,
+ unsigned int *ecc_error)
+{
+ unsigned int ecc_status = (status >> SPI_NAND_GD5F_ECC_SHIFT) &
+ SPI_NAND_GD5F_ECC_MASK;
+
+ *ecc_error = (ecc_status == SPI_NAND_GD5F_ECC_UNCORR) ? 1 : 0;
+ if (*ecc_error == 0)
+ *corrected = (ecc_status > 1) ? (2 + ecc_status) : 0;
+}
+
+static int spi_nand_device_probe(struct spi_device *spi)
+{
+ enum spi_nand_device_variant variant;
+ struct spi_nand_device *priv;
+ struct spi_nand *snand;
+ int ret;
+
+ priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ snand = &priv->spi_nand;
+
+ snand->read_cache = spi_nand_device_read_cache;
+ snand->load_page = spi_nand_device_load_page;
+ snand->store_cache = spi_nand_device_store_cache;
+ snand->write_page = spi_nand_device_write_page;
+ snand->write_reg = spi_nand_device_write_reg;
+ snand->read_reg = spi_nand_device_read_reg;
+ snand->block_erase = spi_nand_device_block_erase;
+ snand->reset = spi_nand_device_reset;
+ snand->write_enable = spi_nand_device_write_enable;
+ snand->write_disable = spi_nand_device_write_disable;
+ snand->dev = &spi->dev;
+ snand->priv = priv;
+
+ /* This'll mean we won't need to specify any specific compatible string
+ * for a given device, and instead just support spi-nand.
+ */
+ variant = spi_get_device_id(spi)->driver_data;
+ switch (variant) {
+ case SPI_NAND_GD5F:
+ snand->read_id = spi_nand_gd5f_read_id;
+ snand->get_ecc_status = spi_nand_gd5f_ecc_status;
+ snand->ooblayout = &spi_nand_gd5f_oob_256_ops;
+ break;
+ default:
+ dev_err(snand->dev, "unknown device\n");
+ return -ENODEV;
+ }
+
+ spi_set_drvdata(spi, snand);
+ priv->spi = spi;
+
+ ret = spi_nand_register(snand, spi_nand_flash_ids);
+ if (ret)
+ return ret;
+ return 0;
+}
+
+static int spi_nand_device_remove(struct spi_device *spi)
+{
+ struct spi_nand *snand = spi_get_drvdata(spi);
+
+ spi_nand_unregister(snand);
+
+ return 0;
+}
+
+const struct spi_device_id spi_nand_id_table[] = {
+ { "spi-nand", SPI_NAND_GENERIC },
+ { "gd5f", SPI_NAND_GD5F },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, spi_nand_id_table);
+
+static struct spi_driver spi_nand_device_driver = {
+ .driver = {
+ .name = "spi_nand_device",
+ .owner = THIS_MODULE,
+ },
+ .id_table = spi_nand_id_table,
+ .probe = spi_nand_device_probe,
+ .remove = spi_nand_device_remove,
+};
+module_spi_driver(spi_nand_device_driver);
+
+MODULE_AUTHOR("Ezequiel Garcia <ezequiel.garcia@imgtec.com>");
+MODULE_DESCRIPTION("SPI NAND device support");
+MODULE_LICENSE("GPL v2");

20
target/linux/pistachio/patches-4.14/901-MIPS-DTS-img-marduk-add-nor-partition-name.patch
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@ -0,0 +1,20 @@
From b5f49b448cd3c7ab930f1a53c88f739a86071df8 Mon Sep 17 00:00:00 2001
From: Ian Pozella <Ian.Pozella@imgtec.com>
Date: Mon, 20 Feb 2017 10:38:07 +0000
Subject: MIPS: DTS: img: marduk: add nor partition name
Signed-off-by: Ian Pozella <Ian.Pozella@imgtec.com>
---
arch/mips/boot/dts/img/pistachio_marduk.dts | 1 +
1 file changed, 1 insertion(+)
--- a/arch/mips/boot/dts/img/pistachio_marduk.dts
+++ b/arch/mips/boot/dts/img/pistachio_marduk.dts
@@ -90,6 +90,7 @@
compatible = "spansion,s25fl016k", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
+ linux,mtd-name = "spi-nor";
};
};

30
target/linux/pistachio/patches-4.14/902-MIPS-DTS-img-marduk-add-nand-device-support.patch
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@ -0,0 +1,30 @@
From c13cfb3a49cf1578bb85f19a7066f262503a39ba Mon Sep 17 00:00:00 2001
From: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
Date: Thu, 24 Nov 2016 19:26:46 +0530
Subject: MIPS: DTS: img: marduk: add nand device support
Signed-off-by: Abhimanyu Vishwakarma <Abhimanyu.Vishwakarma@imgtec.com>
---
arch/mips/boot/dts/img/pistachio_marduk.dts | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/arch/mips/boot/dts/img/pistachio_marduk.dts
+++ b/arch/mips/boot/dts/img/pistachio_marduk.dts
@@ -92,6 +92,17 @@
spi-max-frequency = <50000000>;
linux,mtd-name = "spi-nor";
};
+ flash@1 {
+ compatible = "gigadevice,gd5f";
+ reg = <1>;
+ spi-max-frequency = <50000000>;
+ nand-on-flash-bbt;
+ spi-rx-bus-width = <2>;
+ spi-tx-bus-width = <4>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ linux,mtd-name = "spi-nand";
+ };
};
&uart0 {
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