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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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brcmfmac: Remove brcmf_sdiod_request_data()
This function is obfuscating how IO works on this chip. Remove it
and push its logic into brcmf_sdiod_reg_{read,write}().
Handling of -ENOMEDIUM is altered, but as that's pretty much broken anyway
we can ignore that.
Signed-off-by: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Ian Molton
Kalle Valo
parent
4a3338ba2a
commit
993a98a42e
@ -230,6 +230,43 @@ void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
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sdiodev->state = state;
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}
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static int brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev,
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u32 address)
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{
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int err = 0, i;
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u32 addr;
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if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
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return -ENOMEDIUM;
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addr = (address & SBSDIO_SBWINDOW_MASK) >> 8;
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for (i = 0 ; i < 3 && !err ; i++, addr >>= 8)
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brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i,
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addr & 0xff, &err);
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return err;
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}
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static int brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, u32 *addr)
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{
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uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
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int err = 0;
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if (bar0 != sdiodev->sbwad) {
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err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
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if (err)
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return err;
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sdiodev->sbwad = bar0;
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}
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*addr &= SBSDIO_SB_OFT_ADDR_MASK;
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*addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
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return 0;
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}
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static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func, u8 byte,
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uint regaddr)
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{
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@ -249,173 +286,84 @@ static inline int brcmf_sdiod_f0_writeb(struct sdio_func *func, u8 byte,
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return err_ret;
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}
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static int brcmf_sdiod_request_data(struct brcmf_sdio_dev *sdiodev, u8 fn,
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u32 addr, u8 regsz, void *data, bool write)
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{
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struct sdio_func *func;
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int ret = -EINVAL;
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brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
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write, fn, addr, regsz);
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/* only allow byte access on F0 */
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if (WARN_ON(regsz > 1 && !fn))
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return -EINVAL;
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func = sdiodev->func[fn];
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switch (regsz) {
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case 1:
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if (write) {
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if (fn)
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sdio_writeb(func, *(u8 *)data, addr, &ret);
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else
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ret = brcmf_sdiod_f0_writeb(func, *(u8 *)data,
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addr);
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} else {
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if (fn)
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*(u8 *)data = sdio_readb(func, addr, &ret);
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else
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*(u8 *)data = sdio_f0_readb(func, addr, &ret);
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}
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break;
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case 2:
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if (write)
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sdio_writew(func, *(u16 *)data, addr, &ret);
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else
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*(u16 *)data = sdio_readw(func, addr, &ret);
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break;
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case 4:
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if (write)
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sdio_writel(func, *(u32 *)data, addr, &ret);
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else
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*(u32 *)data = sdio_readl(func, addr, &ret);
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break;
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default:
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brcmf_err("invalid size: %d\n", regsz);
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break;
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}
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if (ret)
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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", fn, addr, ret);
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return ret;
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}
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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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int ret;
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if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
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return -ENOMEDIUM;
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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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* f0 writes must be bytewise
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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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do {
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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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if ((addr & ~REG_F0_REG_MASK) == 0) {
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if (WARN_ON(regsz > 1))
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return -EINVAL;
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ret = brcmf_sdiod_f0_writeb(sdiodev->func[0],
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*(u8 *)data, addr);
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} else {
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switch (regsz) {
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case 1:
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sdio_writeb(sdiodev->func[1], *(u8 *)data, addr, &ret);
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break;
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case 4:
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ret = brcmf_sdiod_addrprep(sdiodev, &addr);
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if (ret)
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goto done;
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ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
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data, true);
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} while (ret != 0 && ret != -ENOMEDIUM &&
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retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
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if (ret == -ENOMEDIUM)
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brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
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sdio_writel(sdiodev->func[1], *(u32 *)data, addr, &ret);
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break;
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default:
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WARN(1, "Invalid reg size\n");
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ret = -EINVAL;
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break;
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}
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}
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done:
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return ret;
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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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if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
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return -ENOMEDIUM;
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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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* f0 reads must be bytewise
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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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if ((addr & ~REG_F0_REG_MASK) == 0) {
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if (WARN_ON(regsz > 1))
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return -EINVAL;
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*(u8 *)data = sdio_f0_readb(sdiodev->func[0], addr, &ret);
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} else {
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switch (regsz) {
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case 1:
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*(u8 *)data = sdio_readb(sdiodev->func[1], addr, &ret);
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break;
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case 4:
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ret = brcmf_sdiod_addrprep(sdiodev, &addr);
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if (ret)
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goto done;
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do {
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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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ret = brcmf_sdiod_request_data(sdiodev, func, addr, regsz,
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data, false);
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} while (ret != 0 && ret != -ENOMEDIUM &&
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retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
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if (ret == -ENOMEDIUM)
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brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM);
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return ret;
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}
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static int
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brcmf_sdiod_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
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{
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int err = 0, i;
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u32 addr;
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if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM)
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return -ENOMEDIUM;
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addr = (address & SBSDIO_SBWINDOW_MASK) >> 8;
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for (i = 0 ; i < 3 && !err ; i++, addr >>= 8)
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brcmf_sdiod_regwb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i,
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addr & 0xff, &err);
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return err;
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}
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static int
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brcmf_sdiod_addrprep(struct brcmf_sdio_dev *sdiodev, u32 *addr)
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{
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uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
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int err = 0;
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if (bar0 != sdiodev->sbwad) {
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err = brcmf_sdiod_set_sbaddr_window(sdiodev, bar0);
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if (err)
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return err;
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sdiodev->sbwad = bar0;
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*(u32 *)data = sdio_readl(sdiodev->func[1], addr, &ret);
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break;
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default:
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WARN(1, "Invalid reg size\n");
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ret = -EINVAL;
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break;
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}
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}
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*addr &= SBSDIO_SB_OFT_ADDR_MASK;
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*addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
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return 0;
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done:
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return ret;
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}
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u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
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@ -439,15 +387,9 @@ u32 brcmf_sdiod_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
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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_addrprep(sdiodev, &addr);
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if (retval)
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goto done;
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retval = brcmf_sdiod_reg_read(sdiodev, addr, 4, &data);
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brcmf_dbg(SDIO, "data:0x%08x\n", data);
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done:
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if (ret)
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*ret = retval;
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@ -472,13 +414,8 @@ void brcmf_sdiod_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
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int retval;
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brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
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retval = brcmf_sdiod_addrprep(sdiodev, &addr);
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if (retval)
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goto done;
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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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*ret = retval;
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}
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@ -886,14 +823,12 @@ brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
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return bcmerror;
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}
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int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
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int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, u8 fn)
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{
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char t_func = (char)fn;
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brcmf_dbg(SDIO, "Enter\n");
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/* issue abort cmd52 command through F0 */
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brcmf_sdiod_request_data(sdiodev, SDIO_FUNC_0, SDIO_CCCR_ABORT,
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1, &t_func, true);
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brcmf_sdiod_reg_write(sdiodev, SDIO_CCCR_ABORT, 1, &fn);
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brcmf_dbg(SDIO, "Exit\n");
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return 0;
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@ -339,7 +339,7 @@ int brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
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u8 *data, uint size);
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/* Issue an abort to the specified function */
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int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, uint fn);
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int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, u8 fn);
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void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev);
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void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
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enum brcmf_sdiod_state state);
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