From: Ian Molton <ian@mnementh.co.uk>
To: linux-wireless@vger.kernel.org
Cc: arend.vanspriel@broadcom.com, franky.lin@broadcom.com,
hante.meuleman@broadcom.com
Subject: [PATCH 03/34] brcmfmac: Split brcmf_sdiod_regrw_helper() up.
Date: Wed, 19 Jul 2017 20:07:51 +0100 [thread overview]
Message-ID: <20170719190822.10857-4-ian@mnementh.co.uk> (raw)
In-Reply-To: <20170719190822.10857-1-ian@mnementh.co.uk>
This large function is concealing a LOT of obscure logic about
how the hardware functions. Time to split it up.
This first patch splits the function into two pieces - read and write,
doing away with the rw flag in the process.
Signed-off-by: Ian Molton <ian@mnementh.co.uk>
---
.../wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 94 +++++++++++++++++-----
1 file changed, 73 insertions(+), 21 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index db983168ceba..5b9a21d6b6b2 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -300,8 +300,8 @@ static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
return ret;
}
-static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
- u8 regsz, void *data, bool write)
+static int brcmf_sdiod_reg_write(struct brcmf_sdio_dev *sdiodev, u32 addr,
+ u8 regsz, void *data)
{
u8 func;
s32 retry = 0;
@@ -322,13 +322,66 @@ static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
func = SDIO_FUNC_1;
do {
- if (!write)
- memset(data, 0, regsz);
/* for retry wait for 1 ms till bus get settled down */
if (retry)
usleep_range(1000, 2000);
+
+ ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
+ data, true);
+
+ } while (ret != 0 && ret != -ENOMEDIUM &&
+ retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
+
+ if (ret == -ENOMEDIUM)
+ brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
+ else if (ret != 0) {
+ /*
+ * SleepCSR register access can fail when
+ * waking up the device so reduce this noise
+ * in the logs.
+ */
+ if (addr != SBSDIO_FUNC1_SLEEPCSR)
+ brcmf_err("failed to write data F%d@0x%05x, err: %d\n",
+ func, addr, ret);
+ else
+ brcmf_dbg(SDIO, "failed to write data F%d@0x%05x, err: %d\n",
+ func, addr, ret);
+ }
+
+ return ret;
+}
+
+static int brcmf_sdiod_reg_read(struct brcmf_sdio_dev *sdiodev, u32 addr,
+ u8 regsz, void *data)
+{
+ u8 func;
+ s32 retry = 0;
+ int ret;
+
+ if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
+ return -ENOMEDIUM;
+
+ /*
+ * figure out how to read the register based on address range
+ * 0x00 ~ 0x7FF: function 0 CCCR and FBR
+ * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
+ * The rest: function 1 silicon backplane core registers
+ */
+ if ((addr & ~REG_F0_REG_MASK) == 0)
+ func = SDIO_FUNC_0;
+ else
+ func = SDIO_FUNC_1;
+
+ do {
+ memset(data, 0, regsz);
+
+ /* for retry wait for 1 ms till bus get settled down */
+ if (retry)
+ usleep_range(1000, 2000);
+
ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
- data, write);
+ data, false);
+
} while (ret != 0 && ret != -ENOMEDIUM &&
retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
@@ -341,12 +394,13 @@ static int brcmf_sdiod_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
* in the logs.
*/
if (addr != SBSDIO_FUNC1_SLEEPCSR)
- brcmf_err("failed to %s data F%d@0x%05x, err: %d\n",
- write ? "write" : "read", func, addr, ret);
+ brcmf_err("failed to read data F%d@0x%05x, err: %d\n",
+ func, addr, ret);
else
- brcmf_dbg(SDIO, "failed to %s data F%d@0x%05x, err: %d\n",
- write ? "write" : "read", func, addr, ret);
+ brcmf_dbg(SDIO, "failed to read data F%d@0x%05x, err: %d\n",
+ func, addr, ret);
}
+
return ret;
}
@@ -364,13 +418,11 @@ brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
for (i = 0; i < 3; i++) {
- err = brcmf_sdiod_regrw_helper(sdiodev,
- SBSDIO_FUNC1_SBADDRLOW + i,
- 1, &addr[i], true);
+ brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i, addr[i],
+ &err);
if (err) {
brcmf_err("failed at addr: 0x%0x\n",
SBSDIO_FUNC1_SBADDRLOW + i);
- break;
}
}
@@ -405,8 +457,7 @@ u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
int retval;
brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 1, &data,
- false);
+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 1, &data);
brcmf_dbg(SDIO, "data:0x%02x\n", data);
if (ret)
@@ -424,8 +475,9 @@ u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
retval = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
if (retval)
goto done;
- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 4, &data,
- false);
+
+ retval = brcmf_sdiod_reg_read(sdiodev, addr, 4, &data);
+
brcmf_dbg(SDIO, "data:0x%08x\n", data);
done:
@@ -441,8 +493,8 @@ void brcmf_sdiod_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
int retval;
brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 1, &data,
- true);
+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 1, &data);
+
if (ret)
*ret = retval;
}
@@ -456,8 +508,8 @@ void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
retval = brcmf_sdiod_addrprep(sdiodev, 4, &addr);
if (retval)
goto done;
- retval = brcmf_sdiod_regrw_helper(sdiodev, addr, 4, &data,
- true);
+
+ retval = brcmf_sdiod_reg_write(sdiodev, addr, 4, &data);
done:
if (ret)
--
2.11.0
next prev parent reply other threads:[~2017-07-19 19:08 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-19 19:07 PATCH v3 brcmfmac driver cleanup Ian Molton
2017-07-19 19:07 ` [PATCH 01/34] brcmfmac: Fix parameter order in brcmf_sdiod_f0_writeb() Ian Molton
2017-07-19 19:07 ` [PATCH 02/34] brcmfmac: Register sizes on hardware are not dependent on compiler types Ian Molton
2017-07-19 19:07 ` Ian Molton [this message]
2017-07-19 19:07 ` [PATCH 04/34] brcmfmac: Clean up brcmf_sdiod_set_sbaddr_window() Ian Molton
2017-07-19 19:07 ` [PATCH 05/34] brcmfmac: Remove dead IO code Ian Molton
2017-07-19 19:07 ` [PATCH 06/34] brcmfmac: Remove bandaid for SleepCSR Ian Molton
2017-07-19 19:07 ` [PATCH 07/34] brcmfmac: Remove brcmf_sdiod_request_data() Ian Molton
2017-07-19 19:07 ` [PATCH 08/34] brcmfmac: Fix uninitialised variable Ian Molton
2017-07-19 19:07 ` [PATCH 09/34] brcmfmac: Remove noisy debugging Ian Molton
2017-07-19 19:07 ` [PATCH 10/34] brcmfmac: Rename bcmerror to err Ian Molton
2017-07-19 19:07 ` [PATCH 11/34] brcmfmac: Split brcmf_sdiod_buffrw function up Ian Molton
2017-07-19 19:08 ` [PATCH 12/34] brcmfmac: Replace old IO functions with simpler ones Ian Molton
2017-07-19 19:08 ` [PATCH 13/34] brcmfmac: Tidy register definitions a little Ian Molton
2017-07-19 19:08 ` [PATCH 14/34] brcmfmac: Remove brcmf_sdiod_addrprep() Ian Molton
2017-07-19 19:08 ` [PATCH 15/34] brcmfamc: remove unnecessary call to brcmf_sdiod_set_backplane_window() Ian Molton
2017-07-19 19:08 ` [PATCH 16/34] brcmfmac: Cleanup offsetof() Ian Molton
2017-07-19 19:08 ` [PATCH 17/34] brcmfmac: Remove unused macro Ian Molton
2017-07-19 19:08 ` [PATCH 18/34] brcmfmac: Rename SOC_AI to SOC_AXI Ian Molton
2017-07-19 19:08 ` [PATCH 19/34] brcmfmac: Get rid of chip_priv and core_priv structs Ian Molton
2017-07-19 19:08 ` [PATCH 20/34] brcmfmac: Whitespace patch Ian Molton
2017-07-19 19:08 ` [PATCH 21/34] brcmfmac: Simplify chip probe routine Ian Molton
2017-07-19 19:08 ` [PATCH 22/34] brcmfmac: Rename axi functions for clarity Ian Molton
2017-07-19 19:08 ` [PATCH 23/34] brcmfmac: HUGE cleanup of IO access functions Ian Molton
2017-07-19 19:08 ` [PATCH 24/34] brcmfmac: Rename chip.ctx -> chip.bus_priv Ian Molton
2017-07-19 19:08 ` [PATCH 25/34] brcmfmac: Remove repeated calls to brcmf_chip_get_core() Ian Molton
2017-07-19 19:08 ` [PATCH 26/34] brcmfmac: General cleaning up. whitespace and comments fix Ian Molton
2017-07-19 19:08 ` [PATCH 27/34] brcmfmac: Remove {r,w}_sdreg32 Ian Molton
2017-07-19 19:08 ` [PATCH 28/34] brcmfmac: Rename buscore->core for consistency Ian Molton
2017-07-19 19:08 ` [PATCH 29/34] brcmfmac: stabilise the value of ->sbwad in use for some xfer routines Ian Molton
2017-07-19 19:08 ` [PATCH 30/34] brcmfmac: Correctly handle accesses to SDIO func0 Ian Molton
2017-07-19 19:08 ` [PATCH 31/34] brcmfmac: Remove func0 from function array Ian Molton
2017-07-19 19:08 ` [PATCH 32/34] brcmfmac: Replace function index with function pointer Ian Molton
2017-07-19 19:08 ` [PATCH 33/34] brcmfmac: Remove array of functions Ian Molton
2017-07-19 19:08 ` [PATCH 34/34] brcmfmac: Reduce the noise from repeatedly dereferencing common pointers Ian Molton
2017-07-24 19:47 ` PATCH v3 brcmfmac driver cleanup Arend van Spriel
2017-07-26 10:23 ` Ian Molton
2017-07-26 20:25 Patch v4: Clean up brcmfmac driver Ian Molton
2017-07-26 20:25 ` [PATCH 03/34] brcmfmac: Split brcmf_sdiod_regrw_helper() up Ian Molton
2017-08-07 11:25 ` Arend van Spriel
2017-08-07 17:49 ` Ian Molton
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