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180 lines
5.1 KiB
Diff
180 lines
5.1 KiB
Diff
From 0fcc9fe0048422d66bb906eaa73cc75e11ff7345 Mon Sep 17 00:00:00 2001
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From: Ian Molton <ian@mnementh.co.uk>
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Date: Mon, 13 Nov 2017 21:35:40 +0100
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Subject: [PATCH] brcmfmac: Split brcmf_sdiod_regrw_helper() up.
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This large function is concealing a LOT of obscure logic about
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how the hardware functions. Time to split it up.
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This first patch splits the function into two pieces - read and write,
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doing away with the rw flag in the process.
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Signed-off-by: Ian Molton <ian@mnementh.co.uk>
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Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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.../wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 94 +++++++++++++++++-----
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1 file changed, 73 insertions(+), 21 deletions(-)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
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@@ -302,8 +302,8 @@ static int brcmf_sdiod_request_data(stru
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return ret;
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}
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-static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
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- u8 regsz, void *data, bool write)
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+static int brcmf_sdiod_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr,
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+ u8 regsz, void *data)
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{
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u8 func;
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s32 retry = 0;
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@@ -324,13 +324,66 @@ static int brcmf_sdiod_regrw_helper(stru
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func = SDIO_FUNC_1;
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do {
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- if (!write)
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- memset(data, 0, regsz);
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/* for retry wait for 1 ms till bus get settled down */
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if (retry)
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usleep_range(1000, 2000);
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+
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+ ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
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+ data, true);
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+
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+ } while (ret != 0 && ret != -ENOMEDIUM &&
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+ retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
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+
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+ if (ret == -ENOMEDIUM) {
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+ brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
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+ } else if (ret != 0) {
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+ /*
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+ * SleepCSR register access can fail when
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+ * waking up the device so reduce this noise
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+ * in the logs.
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+ */
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+ if (addr != SBSDIO_FUNC1_SLEEPCSR)
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+ brcmf_err("failed to write data F%d@0x%05x, err: %d\n",
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+ func, addr, ret);
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+ else
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+ brcmf_dbg(SDIO, "failed to write data F%d@0x%05x, err: %d\n",
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+ func, addr, ret);
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+ }
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+
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+ return ret;
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+}
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+
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+static int brcmf_sdiod_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr,
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+ u8 regsz, void *data)
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+{
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+ u8 func;
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+ s32 retry = 0;
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+ int ret;
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+
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+ if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
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+ return -ENOMEDIUM;
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+
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+ /*
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+ * figure out how to read the register based on address range
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+ * 0x00 ~ 0x7FF: function 0 CCCR and FBR
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+ * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
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+ * The rest: function 1 silicon backplane core registers
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+ */
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+ if ((addr & ~REG_F0_REG_MASK) == 0)
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+ func = SDIO_FUNC_0;
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+ else
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+ func = SDIO_FUNC_1;
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+
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+ do {
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+ memset(data, 0, regsz);
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+
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+ /* for retry wait for 1 ms till bus get settled down */
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+ if (retry)
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+ usleep_range(1000, 2000);
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+
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ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
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- data, write);
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+ data, false);
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+
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} while (ret != 0 && ret != -ENOMEDIUM &&
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retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
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@@ -343,12 +396,13 @@ static int brcmf_sdiod_regrw_helper(stru
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* in the logs.
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*/
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if (addr != SBSDIO_FUNC1_SLEEPCSR)
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- brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
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- write ? "write" : "read", func, addr, ret);
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+ brcmf_err("failed to read data F%d@0x%05x, err: %d\n",
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+ func, addr, ret);
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else
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- brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
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- write ? "write" : "read", func, addr, ret);
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+ brcmf_dbg(SDIO, "failed to read data F%d@0x%05x, err: %d\n",
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+ func, addr, ret);
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}
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+
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return ret;
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}
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@@ -366,13 +420,11 @@ brcmf_sdiod_set_sbaddr_window(struct brc
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addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
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for (i = 0; i < 3; i++) {
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- err = brcmf_sdiod_regrw_helper(sdiodev,
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- SBSDIO_FUNC1_SBADDRLOW + i,
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- 1, &addr[i], true);
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+ brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i, addr[i],
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+ &err);
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if (err) {
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brcmf_err("failed at addr: 0x%0x\n",
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SBSDIO_FUNC1_SBADDRLOW + i);
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- break;
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}
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}
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@@ -407,8 +459,7 @@ u8 brcmf_sdiod_regrb(struct brcmf_sdio_d
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int retval;
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brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
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- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 1, &data,
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- false);
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+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 1, &data);
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brcmf_dbg(SDIO, "data:0x%02x\n", data);
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if (ret)
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@@ -426,8 +477,9 @@ u32 brcmf_sdiod_regrl(struct brcmf_sdio_
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retval = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
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if (retval)
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goto done;
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- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 4, &data,
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- false);
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+
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+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 4, &data);
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+
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brcmf_dbg(SDIO, "data:0x%08x\n", data);
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done:
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@@ -443,8 +495,8 @@ void brcmf_sdiod_regwb(struct brcmf_sdio
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int retval;
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brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
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- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 1, &data,
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- true);
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+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 1, &data);
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+
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if (ret)
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*ret = retval;
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}
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@@ -458,8 +510,8 @@ void brcmf_sdiod_regwl(struct brcmf_sdio
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retval = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
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if (retval)
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goto done;
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- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 4, &data,
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- true);
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+
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+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 4, &data);
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done:
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if (ret)
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