diff options
Diffstat (limited to 'drivers/net/wireless/microchip/wilc1000/sdio.c')
| -rw-r--r-- | drivers/net/wireless/microchip/wilc1000/sdio.c | 1076 |
1 files changed, 1076 insertions, 0 deletions
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c new file mode 100644 index 000000000000..af970f999111 --- /dev/null +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -0,0 +1,1076 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries. + * All rights reserved. + */ + +#include <linux/clk.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio_ids.h> +#include <linux/mmc/host.h> +#include <linux/mmc/sdio.h> +#include <linux/of_irq.h> + +#include "netdev.h" +#include "cfg80211.h" + +#define SDIO_MODALIAS "wilc1000_sdio" + +static const struct sdio_device_id wilc_sdio_ids[] = { + { SDIO_DEVICE(SDIO_VENDOR_ID_MICROCHIP_WILC, SDIO_DEVICE_ID_MICROCHIP_WILC1000) }, + { }, +}; +MODULE_DEVICE_TABLE(sdio, wilc_sdio_ids); + +#define WILC_SDIO_BLOCK_SIZE 512 + +static int wilc_sdio_init(struct wilc *wilc, bool resume); +static int wilc_sdio_deinit(struct wilc *wilc); + +struct wilc_sdio { + bool irq_gpio; + u32 block_size; + bool isinit; + u8 *cmd53_buf; +}; + +struct sdio_cmd52 { + u32 read_write: 1; + u32 function: 3; + u32 raw: 1; + u32 address: 17; + u32 data: 8; +}; + +struct sdio_cmd53 { + u32 read_write: 1; + u32 function: 3; + u32 block_mode: 1; + u32 increment: 1; + u32 address: 17; + u32 count: 9; + u8 *buffer; + u32 block_size; + bool use_global_buf; +}; + +static const struct wilc_hif_func wilc_hif_sdio; + +static void wilc_sdio_interrupt(struct sdio_func *func) +{ + sdio_release_host(func); + wilc_handle_isr(sdio_get_drvdata(func)); + sdio_claim_host(func); +} + +static int wilc_sdio_cmd52(struct wilc *wilc, struct sdio_cmd52 *cmd) +{ + struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev); + int ret; + u8 data; + + sdio_claim_host(func); + + func->num = cmd->function; + if (cmd->read_write) { /* write */ + if (cmd->raw) { + sdio_writeb(func, cmd->data, cmd->address, &ret); + data = sdio_readb(func, cmd->address, &ret); + cmd->data = data; + } else { + sdio_writeb(func, cmd->data, cmd->address, &ret); + } + } else { /* read */ + data = sdio_readb(func, cmd->address, &ret); + cmd->data = data; + } + + sdio_release_host(func); + + if (ret) + dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret); + return ret; +} + +static int wilc_sdio_cmd53(struct wilc *wilc, struct sdio_cmd53 *cmd) +{ + struct sdio_func *func = container_of(wilc->dev, struct sdio_func, dev); + int size, ret; + struct wilc_sdio *sdio_priv = wilc->bus_data; + u8 *buf = cmd->buffer; + + sdio_claim_host(func); + + func->num = cmd->function; + func->cur_blksize = cmd->block_size; + if (cmd->block_mode) + size = cmd->count * cmd->block_size; + else + size = cmd->count; + + if (cmd->use_global_buf) { + if (size > sizeof(u32)) { + ret = -EINVAL; + goto out; + } + buf = sdio_priv->cmd53_buf; + } + + if (cmd->read_write) { /* write */ + if (cmd->use_global_buf) + memcpy(buf, cmd->buffer, size); + + ret = sdio_memcpy_toio(func, cmd->address, buf, size); + } else { /* read */ + ret = sdio_memcpy_fromio(func, buf, cmd->address, size); + + if (cmd->use_global_buf) + memcpy(cmd->buffer, buf, size); + } +out: + sdio_release_host(func); + + if (ret) + dev_err(&func->dev, "%s..failed, err(%d)\n", __func__, ret); + + return ret; +} + +static int wilc_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + struct wilc_sdio *sdio_priv; + struct wilc_vif *vif; + struct wilc *wilc; + int ret; + + + sdio_priv = kzalloc(sizeof(*sdio_priv), GFP_KERNEL); + if (!sdio_priv) + return -ENOMEM; + + sdio_priv->cmd53_buf = kzalloc(sizeof(u32), GFP_KERNEL); + if (!sdio_priv->cmd53_buf) { + ret = -ENOMEM; + goto free; + } + + ret = wilc_cfg80211_init(&wilc, &func->dev, WILC_HIF_SDIO, + &wilc_hif_sdio); + if (ret) + goto free; + + if (IS_ENABLED(CONFIG_WILC1000_HW_OOB_INTR)) { + struct device_node *np = func->card->dev.of_node; + int irq_num = of_irq_get(np, 0); + + if (irq_num > 0) { + wilc->dev_irq_num = irq_num; + sdio_priv->irq_gpio = true; + } + } + + sdio_set_drvdata(func, wilc); + wilc->bus_data = sdio_priv; + wilc->dev = &func->dev; + + wilc->rtc_clk = devm_clk_get_optional_enabled(&func->card->dev, "rtc"); + if (IS_ERR(wilc->rtc_clk)) { + ret = PTR_ERR(wilc->rtc_clk); + goto dispose_irq; + } + + wilc_sdio_init(wilc, false); + + ret = wilc_get_chipid(wilc); + if (ret) + goto dispose_irq; + + ret = wilc_cfg80211_register(wilc); + if (ret) + goto dispose_irq; + + ret = wilc_load_mac_from_nv(wilc); + if (ret) { + pr_err("Can not retrieve MAC address from chip\n"); + goto unregister_wiphy; + } + + wilc_sdio_deinit(wilc); + + vif = wilc_netdev_ifc_init(wilc, "wlan%d", WILC_STATION_MODE, + NL80211_IFTYPE_STATION, false); + if (IS_ERR(vif)) { + ret = PTR_ERR(vif); + goto unregister_wiphy; + } + + dev_info(&func->dev, "Driver Initializing success\n"); + return 0; + +unregister_wiphy: + wiphy_unregister(wilc->wiphy); +dispose_irq: + irq_dispose_mapping(wilc->dev_irq_num); + wilc_netdev_cleanup(wilc); + wiphy_free(wilc->wiphy); +free: + kfree(sdio_priv->cmd53_buf); + kfree(sdio_priv); + return ret; +} + +static void wilc_sdio_remove(struct sdio_func *func) +{ + struct wilc *wilc = sdio_get_drvdata(func); + struct wilc_sdio *sdio_priv = wilc->bus_data; + + wilc_netdev_cleanup(wilc); + wiphy_unregister(wilc->wiphy); + wiphy_free(wilc->wiphy); + kfree(sdio_priv->cmd53_buf); + kfree(sdio_priv); +} + +static int wilc_sdio_reset(struct wilc *wilc) +{ + struct sdio_cmd52 cmd; + int ret; + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = SDIO_CCCR_ABORT; + cmd.data = WILC_SDIO_CCCR_ABORT_RESET; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Fail cmd 52, reset cmd ...\n"); + return ret; + } + return 0; +} + +static bool wilc_sdio_is_init(struct wilc *wilc) +{ + struct wilc_sdio *sdio_priv = wilc->bus_data; + + return sdio_priv->isinit; +} + +static int wilc_sdio_enable_interrupt(struct wilc *dev) +{ + struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev); + int ret = 0; + + sdio_claim_host(func); + ret = sdio_claim_irq(func, wilc_sdio_interrupt); + sdio_release_host(func); + + if (ret < 0) { + dev_err(&func->dev, "can't claim sdio_irq, err(%d)\n", ret); + ret = -EIO; + } + return ret; +} + +static void wilc_sdio_disable_interrupt(struct wilc *dev) +{ + struct sdio_func *func = container_of(dev->dev, struct sdio_func, dev); + int ret; + + sdio_claim_host(func); + ret = sdio_release_irq(func); + if (ret < 0) + dev_err(&func->dev, "can't release sdio_irq, err(%d)\n", ret); + sdio_release_host(func); +} + +/******************************************** + * + * Function 0 + * + ********************************************/ + +static int wilc_sdio_set_func0_csa_address(struct wilc *wilc, u32 adr) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct sdio_cmd52 cmd; + int ret; + + /** + * Review: BIG ENDIAN + **/ + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = WILC_SDIO_FBR_CSA_REG; + cmd.data = (u8)adr; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed cmd52, set %04x data...\n", + cmd.address); + return ret; + } + + cmd.address = WILC_SDIO_FBR_CSA_REG + 1; + cmd.data = (u8)(adr >> 8); + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed cmd52, set %04x data...\n", + cmd.address); + return ret; + } + + cmd.address = WILC_SDIO_FBR_CSA_REG + 2; + cmd.data = (u8)(adr >> 16); + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed cmd52, set %04x data...\n", + cmd.address); + return ret; + } + + return 0; +} + +static int wilc_sdio_set_block_size(struct wilc *wilc, u8 func_num, + u32 block_size) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct sdio_cmd52 cmd; + int ret; + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE; + cmd.data = (u8)block_size; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed cmd52, set %04x data...\n", + cmd.address); + return ret; + } + + cmd.address = SDIO_FBR_BASE(func_num) + SDIO_CCCR_BLKSIZE + 1; + cmd.data = (u8)(block_size >> 8); + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed cmd52, set %04x data...\n", + cmd.address); + return ret; + } + + return 0; +} + +/******************************************** + * + * Sdio interfaces + * + ********************************************/ +static int wilc_sdio_write_reg(struct wilc *wilc, u32 addr, u32 data) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + int ret; + + cpu_to_le32s(&data); + + if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */ + struct sdio_cmd52 cmd; + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = addr; + cmd.data = data; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) + dev_err(&func->dev, + "Failed cmd 52, read reg (%08x) ...\n", addr); + } else { + struct sdio_cmd53 cmd; + + /** + * set the AHB address + **/ + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + + cmd.read_write = 1; + cmd.function = 0; + cmd.address = WILC_SDIO_FBR_DATA_REG; + cmd.block_mode = 0; + cmd.increment = 1; + cmd.count = sizeof(u32); + cmd.buffer = (u8 *)&data; + cmd.use_global_buf = true; + cmd.block_size = sdio_priv->block_size; + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) + dev_err(&func->dev, + "Failed cmd53, write reg (%08x)...\n", addr); + } + + return ret; +} + +static int wilc_sdio_write(struct wilc *wilc, u32 addr, u8 *buf, u32 size) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + u32 block_size = sdio_priv->block_size; + struct sdio_cmd53 cmd; + int nblk, nleft, ret; + + cmd.read_write = 1; + if (addr > 0) { + /** + * func 0 access + **/ + cmd.function = 0; + cmd.address = WILC_SDIO_FBR_DATA_REG; + } else { + /** + * func 1 access + **/ + cmd.function = 1; + cmd.address = WILC_SDIO_F1_DATA_REG; + } + + size = ALIGN(size, 4); + nblk = size / block_size; + nleft = size % block_size; + + cmd.use_global_buf = false; + if (nblk > 0) { + cmd.block_mode = 1; + cmd.increment = 1; + cmd.count = nblk; + cmd.buffer = buf; + cmd.block_size = block_size; + if (addr > 0) { + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + } + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd53 [%x], block send...\n", addr); + return ret; + } + if (addr > 0) + addr += nblk * block_size; + buf += nblk * block_size; + } + + if (nleft > 0) { + cmd.block_mode = 0; + cmd.increment = 1; + cmd.count = nleft; + cmd.buffer = buf; + + cmd.block_size = block_size; + + if (addr > 0) { + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + } + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd53 [%x], bytes send...\n", addr); + return ret; + } + } + + return 0; +} + +static int wilc_sdio_read_reg(struct wilc *wilc, u32 addr, u32 *data) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + int ret; + + if (addr >= 0xf0 && addr <= 0xff) { /* only vendor specific registers */ + struct sdio_cmd52 cmd; + + cmd.read_write = 0; + cmd.function = 0; + cmd.raw = 0; + cmd.address = addr; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd 52, read reg (%08x) ...\n", addr); + return ret; + } + *data = cmd.data; + } else { + struct sdio_cmd53 cmd; + + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + + cmd.read_write = 0; + cmd.function = 0; + cmd.address = WILC_SDIO_FBR_DATA_REG; + cmd.block_mode = 0; + cmd.increment = 1; + cmd.count = sizeof(u32); + cmd.buffer = (u8 *)data; + cmd.use_global_buf = true; + + cmd.block_size = sdio_priv->block_size; + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd53, read reg (%08x)...\n", addr); + return ret; + } + } + + le32_to_cpus(data); + return 0; +} + +static int wilc_sdio_read(struct wilc *wilc, u32 addr, u8 *buf, u32 size) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + u32 block_size = sdio_priv->block_size; + struct sdio_cmd53 cmd; + int nblk, nleft, ret; + + cmd.read_write = 0; + if (addr > 0) { + /** + * func 0 access + **/ + cmd.function = 0; + cmd.address = WILC_SDIO_FBR_DATA_REG; + } else { + /** + * func 1 access + **/ + cmd.function = 1; + cmd.address = WILC_SDIO_F1_DATA_REG; + } + + size = ALIGN(size, 4); + nblk = size / block_size; + nleft = size % block_size; + + cmd.use_global_buf = false; + if (nblk > 0) { + cmd.block_mode = 1; + cmd.increment = 1; + cmd.count = nblk; + cmd.buffer = buf; + cmd.block_size = block_size; + if (addr > 0) { + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + } + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd53 [%x], block read...\n", addr); + return ret; + } + if (addr > 0) + addr += nblk * block_size; + buf += nblk * block_size; + } /* if (nblk > 0) */ + + if (nleft > 0) { + cmd.block_mode = 0; + cmd.increment = 1; + cmd.count = nleft; + cmd.buffer = buf; + + cmd.block_size = block_size; + + if (addr > 0) { + ret = wilc_sdio_set_func0_csa_address(wilc, addr); + if (ret) + return ret; + } + ret = wilc_sdio_cmd53(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd53 [%x], bytes read...\n", addr); + return ret; + } + } + + return 0; +} + +/******************************************** + * + * Bus interfaces + * + ********************************************/ + +static int wilc_sdio_deinit(struct wilc *wilc) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + struct sdio_cmd52 cmd; + int ret; + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 1; + + /* Disable all functions interrupts */ + cmd.address = SDIO_CCCR_IENx; + cmd.data = 0; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Failed to disable functions interrupts\n"); + return ret; + } + + /* Disable all functions */ + cmd.address = SDIO_CCCR_IOEx; + cmd.data = 0; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed to reset all functions\n"); + return ret; + } + + /* Disable CSA */ + cmd.read_write = 0; + cmd.address = SDIO_FBR_BASE(1); + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed to read CSA for function 1\n"); + return ret; + } + cmd.read_write = 1; + cmd.address = SDIO_FBR_BASE(1); + cmd.data &= ~SDIO_FBR_ENABLE_CSA; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed to disable CSA for function 1\n"); + return ret; + } + + sdio_priv->isinit = false; + return 0; +} + +static int wilc_sdio_init(struct wilc *wilc, bool resume) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + struct sdio_cmd52 cmd; + int loop, ret; + + /** + * function 0 csa enable + **/ + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 1; + cmd.address = SDIO_FBR_BASE(1); + cmd.data = SDIO_FBR_ENABLE_CSA; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Fail cmd 52, enable csa...\n"); + return ret; + } + + /** + * function 0 block size + **/ + ret = wilc_sdio_set_block_size(wilc, 0, WILC_SDIO_BLOCK_SIZE); + if (ret) { + dev_err(&func->dev, "Fail cmd 52, set func 0 block size...\n"); + return ret; + } + sdio_priv->block_size = WILC_SDIO_BLOCK_SIZE; + + /** + * enable func1 IO + **/ + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 1; + cmd.address = SDIO_CCCR_IOEx; + cmd.data = WILC_SDIO_CCCR_IO_EN_FUNC1; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Fail cmd 52, set IOE register...\n"); + return ret; + } + + /** + * make sure func 1 is up + **/ + cmd.read_write = 0; + cmd.function = 0; + cmd.raw = 0; + cmd.address = SDIO_CCCR_IORx; + loop = 3; + do { + cmd.data = 0; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Fail cmd 52, get IOR register...\n"); + return ret; + } + if (cmd.data == WILC_SDIO_CCCR_IO_EN_FUNC1) + break; + } while (loop--); + + if (loop <= 0) { + dev_err(&func->dev, "Fail func 1 is not ready...\n"); + return -EINVAL; + } + + /** + * func 1 is ready, set func 1 block size + **/ + ret = wilc_sdio_set_block_size(wilc, 1, WILC_SDIO_BLOCK_SIZE); + if (ret) { + dev_err(&func->dev, "Fail set func 1 block size...\n"); + return ret; + } + + /** + * func 1 interrupt enable + **/ + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 1; + cmd.address = SDIO_CCCR_IENx; + cmd.data = WILC_SDIO_CCCR_IEN_MASTER | WILC_SDIO_CCCR_IEN_FUNC1; + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, "Fail cmd 52, set IEN register...\n"); + return ret; + } + + sdio_priv->isinit = true; + return 0; +} + +static int wilc_sdio_read_size(struct wilc *wilc, u32 *size) +{ + u32 tmp; + struct sdio_cmd52 cmd; + + /** + * Read DMA count in words + **/ + cmd.read_write = 0; + cmd.function = 0; + cmd.raw = 0; + cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG; + cmd.data = 0; + wilc_sdio_cmd52(wilc, &cmd); + tmp = cmd.data; + + cmd.address = WILC_SDIO_INTERRUPT_DATA_SZ_REG + 1; + cmd.data = 0; + wilc_sdio_cmd52(wilc, &cmd); + tmp |= (cmd.data << 8); + + *size = tmp; + return 0; +} + +static int wilc_sdio_read_int(struct wilc *wilc, u32 *int_status) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + u32 tmp; + u8 irq_flags; + struct sdio_cmd52 cmd; + + wilc_sdio_read_size(wilc, &tmp); + + /** + * Read IRQ flags + **/ + if (!sdio_priv->irq_gpio) { + cmd.function = 1; + cmd.address = WILC_SDIO_EXT_IRQ_FLAG_REG; + } else { + cmd.function = 0; + cmd.address = is_wilc1000(wilc->chipid) ? + WILC1000_SDIO_IRQ_FLAG_REG : + WILC3000_SDIO_IRQ_FLAG_REG; + } + cmd.raw = 0; + cmd.read_write = 0; + cmd.data = 0; + wilc_sdio_cmd52(wilc, &cmd); + irq_flags = cmd.data; + + if (sdio_priv->irq_gpio) + irq_flags &= is_wilc1000(wilc->chipid) ? 0x1f : 0x0f; + + tmp |= FIELD_PREP(IRG_FLAGS_MASK, cmd.data); + + if (FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags)) + dev_err(&func->dev, "Unexpected interrupt (1) int=%lx\n", + FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags)); + + *int_status = tmp; + + return 0; +} + +static int wilc_sdio_clear_int_ext(struct wilc *wilc, u32 val) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + int ret; + u32 reg = 0; + + if (sdio_priv->irq_gpio) + reg = val & (BIT(MAX_NUM_INT) - 1); + + if (is_wilc1000(wilc->chipid)) { + /* select VMM table 0 */ + if (val & SEL_VMM_TBL0) + reg |= BIT(5); + /* select VMM table 1 */ + if (val & SEL_VMM_TBL1) + reg |= BIT(6); + /* enable VMM */ + if (val & EN_VMM) + reg |= BIT(7); + } else { + if (sdio_priv->irq_gpio && reg) { + struct sdio_cmd52 cmd; + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = WILC3000_SDIO_IRQ_FLAG_REG; + cmd.data = reg; + + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd52, set 0xfe data (%d) ...\n", + __LINE__); + return ret; + } + } + + reg = 0; + /* select VMM table 0 */ + if (val & SEL_VMM_TBL0) + reg |= BIT(0); + /* select VMM table 1 */ + if (val & SEL_VMM_TBL1) + reg |= BIT(1); + /* enable VMM */ + if (val & EN_VMM) + reg |= BIT(2); + } + + if (reg) { + struct sdio_cmd52 cmd; + + cmd.read_write = 1; + cmd.function = 0; + cmd.raw = 0; + cmd.address = is_wilc1000(wilc->chipid) ? + WILC1000_SDIO_IRQ_CLEAR_FLAG_REG : + WILC3000_SDIO_VMM_TBL_CTRL_REG; + cmd.data = reg; + + ret = wilc_sdio_cmd52(wilc, &cmd); + if (ret) { + dev_err(&func->dev, + "Failed cmd52, set (%02x) data (%d) ...\n", + cmd.address, __LINE__); + return ret; + } + } + return 0; +} + +static int wilc_sdio_sync_ext(struct wilc *wilc, int nint) +{ + struct sdio_func *func = dev_to_sdio_func(wilc->dev); + struct wilc_sdio *sdio_priv = wilc->bus_data; + + if (nint > MAX_NUM_INT) { + dev_err(&func->dev, "Too many interrupts (%d)...\n", nint); + return -EINVAL; + } + + if (sdio_priv->irq_gpio) { + u32 reg; + int ret, i; + + /** + * interrupt pin mux select + **/ + ret = wilc_sdio_read_reg(wilc, WILC_PIN_MUX_0, ®); + if (ret) { + dev_err(&func->dev, "Failed read reg (%08x)...\n", + WILC_PIN_MUX_0); + return ret; + } + reg |= BIT(8); + ret = wilc_sdio_write_reg(wilc, WILC_PIN_MUX_0, reg); + if (ret) { + dev_err(&func->dev, "Failed write reg (%08x)...\n", + WILC_PIN_MUX_0); + return ret; + } + + /** + * interrupt enable + **/ + ret = wilc_sdio_read_reg(wilc, WILC_INTR_ENABLE, ®); + if (ret) { + dev_err(&func->dev, "Failed read reg (%08x)...\n", + WILC_INTR_ENABLE); + return ret; + } + + for (i = 0; (i < 5) && (nint > 0); i++, nint--) + reg |= BIT((27 + i)); + ret = wilc_sdio_write_reg(wilc, WILC_INTR_ENABLE, reg); + if (ret) { + dev_err(&func->dev, "Failed write reg (%08x)...\n", + WILC_INTR_ENABLE); + return ret; + } + if (nint) { + ret = wilc_sdio_read_reg(wilc, WILC_INTR2_ENABLE, ®); + if (ret) { + dev_err(&func->dev, + "Failed read reg (%08x)...\n", + WILC_INTR2_ENABLE); + return ret; + } + + for (i = 0; (i < 3) && (nint > 0); i++, nint--) + reg |= BIT(i); + + ret = wilc_sdio_write_reg(wilc, WILC_INTR2_ENABLE, reg); + if (ret) { + dev_err(&func->dev, + "Failed write reg (%08x)...\n", + WILC_INTR2_ENABLE); + return ret; + } + } + } + return 0; +} + +/* Global sdio HIF function table */ +static const struct wilc_hif_func wilc_hif_sdio = { + .hif_init = wilc_sdio_init, + .hif_deinit = wilc_sdio_deinit, + .hif_read_reg = wilc_sdio_read_reg, + .hif_write_reg = wilc_sdio_write_reg, + .hif_block_rx = wilc_sdio_read, + .hif_block_tx = wilc_sdio_write, + .hif_read_int = wilc_sdio_read_int, + .hif_clear_int_ext = wilc_sdio_clear_int_ext, + .hif_read_size = wilc_sdio_read_size, + .hif_block_tx_ext = wilc_sdio_write, + .hif_block_rx_ext = wilc_sdio_read, + .hif_sync_ext = wilc_sdio_sync_ext, + .enable_interrupt = wilc_sdio_enable_interrupt, + .disable_interrupt = wilc_sdio_disable_interrupt, + .hif_reset = wilc_sdio_reset, + .hif_is_init = wilc_sdio_is_init, +}; + +static int wilc_sdio_suspend(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct wilc *wilc = sdio_get_drvdata(func); + int ret; + + dev_info(dev, "sdio suspend\n"); + + if (!wilc->initialized) + return 0; + + if (!IS_ERR(wilc->rtc_clk)) + clk_disable_unprepare(wilc->rtc_clk); + + ret = host_sleep_notify(wilc); + if (ret) { + clk_prepare_enable(wilc->rtc_clk); + return ret; + } + + wilc_sdio_disable_interrupt(wilc); + + return sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); +} + +static int wilc_sdio_resume(struct device *dev) +{ + struct sdio_func *func = dev_to_sdio_func(dev); + struct wilc *wilc = sdio_get_drvdata(func); + + dev_info(dev, "sdio resume\n"); + + if (!wilc->initialized) + return 0; + + if (!IS_ERR(wilc->rtc_clk)) + clk_prepare_enable(wilc->rtc_clk); + + wilc_sdio_init(wilc, true); + wilc_sdio_enable_interrupt(wilc); + + return host_wakeup_notify(wilc); +} + +static const struct of_device_id wilc_of_match[] = { + { .compatible = "microchip,wilc1000", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, wilc_of_match); + +static const struct dev_pm_ops wilc_sdio_pm_ops = { + .suspend = wilc_sdio_suspend, + .resume = wilc_sdio_resume, +}; + +static struct sdio_driver wilc_sdio_driver = { + .name = SDIO_MODALIAS, + .id_table = wilc_sdio_ids, + .probe = wilc_sdio_probe, + .remove = wilc_sdio_remove, + .drv = { + .pm = &wilc_sdio_pm_ops, + .of_match_table = wilc_of_match, + } +}; +module_sdio_driver(wilc_sdio_driver); + +MODULE_DESCRIPTION("Atmel WILC1000 SDIO wireless driver"); +MODULE_LICENSE("GPL"); |