diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_spi.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1251_spi.c | 327 |
1 files changed, 139 insertions, 188 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_spi.c b/drivers/net/wireless/wl12xx/wl1251_spi.c index c5da79dbc49..14eff2b3d4c 100644 --- a/drivers/net/wireless/wl12xx/wl1251_spi.c +++ b/drivers/net/wireless/wl12xx/wl1251_spi.c @@ -21,38 +21,35 @@ * */ +#include <linux/irq.h> #include <linux/module.h> #include <linux/crc7.h> #include <linux/spi/spi.h> +#include <linux/spi/wl12xx.h> #include "wl1251.h" -#include "reg.h" +#include "wl1251_reg.h" #include "wl1251_spi.h" -static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr) +static irqreturn_t wl1251_irq(int irq, void *cookie) { - /* If the address is lower than REGISTERS_BASE, it means that this is - * a chip-specific register address, so look it up in the registers - * table */ - if (addr < REGISTERS_BASE) { - /* Make sure we don't go over the table */ - if (addr >= ACX_REG_TABLE_LEN) { - wl1251_error("address out of range (%d)", addr); - return -EINVAL; - } - addr = wl->chip.acx_reg_table[addr]; - } + struct wl1251 *wl; + + wl1251_debug(DEBUG_IRQ, "IRQ"); + + wl = cookie; - return addr - wl->physical_reg_addr + wl->virtual_reg_addr; + ieee80211_queue_work(wl->hw, &wl->irq_work); + + return IRQ_HANDLED; } -static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr) +static struct spi_device *wl_to_spi(struct wl1251 *wl) { - return addr - wl->physical_mem_addr + wl->virtual_mem_addr; + return wl->if_priv; } - -void wl1251_spi_reset(struct wl1251 *wl) +static void wl1251_spi_reset(struct wl1251 *wl) { u8 *cmd; struct spi_transfer t; @@ -73,12 +70,12 @@ void wl1251_spi_reset(struct wl1251 *wl) t.len = WSPI_INIT_CMD_LEN; spi_message_add_tail(&t, &m); - spi_sync(wl->spi, &m); + spi_sync(wl_to_spi(wl), &m); wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN); } -void wl1251_spi_init(struct wl1251 *wl) +static void wl1251_spi_wake(struct wl1251 *wl) { u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd; struct spi_transfer t; @@ -127,136 +124,19 @@ void wl1251_spi_init(struct wl1251 *wl) t.len = WSPI_INIT_CMD_LEN; spi_message_add_tail(&t, &m); - spi_sync(wl->spi, &m); + spi_sync(wl_to_spi(wl), &m); wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN); } -/* Set the SPI partitions to access the chip addresses - * - * There are two VIRTUAL (SPI) partitions (the memory partition and the - * registers partition), which are mapped to two different areas of the - * PHYSICAL (hardware) memory. This function also makes other checks to - * ensure that the partitions are not overlapping. In the diagram below, the - * memory partition comes before the register partition, but the opposite is - * also supported. - * - * PHYSICAL address - * space - * - * | | - * ...+----+--> mem_start - * VIRTUAL address ... | | - * space ... | | [PART_0] - * ... | | - * 0x00000000 <--+----+... ...+----+--> mem_start + mem_size - * | | ... | | - * |MEM | ... | | - * | | ... | | - * part_size <--+----+... | | {unused area) - * | | ... | | - * |REG | ... | | - * part_size | | ... | | - * + <--+----+... ...+----+--> reg_start - * reg_size ... | | - * ... | | [PART_1] - * ... | | - * ...+----+--> reg_start + reg_size - * | | - * - */ -int wl1251_set_partition(struct wl1251 *wl, - u32 mem_start, u32 mem_size, - u32 reg_start, u32 reg_size) +static void wl1251_spi_reset_wake(struct wl1251 *wl) { - struct wl1251_partition *partition; - struct spi_transfer t; - struct spi_message m; - size_t len, cmd_len; - u32 *cmd; - int addr; - - cmd_len = sizeof(u32) + 2 * sizeof(struct wl1251_partition); - cmd = kzalloc(cmd_len, GFP_KERNEL); - if (!cmd) - return -ENOMEM; - - spi_message_init(&m); - memset(&t, 0, sizeof(t)); - - partition = (struct wl1251_partition *) (cmd + 1); - addr = HW_ACCESS_PART0_SIZE_ADDR; - len = 2 * sizeof(struct wl1251_partition); - - *cmd |= WSPI_CMD_WRITE; - *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; - *cmd |= addr & WSPI_CMD_BYTE_ADDR; - - wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", - mem_start, mem_size); - wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", - reg_start, reg_size); - - /* Make sure that the two partitions together don't exceed the - * address range */ - if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) { - wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual" - " address range. Truncating partition[0]."); - mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size; - wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", - mem_start, mem_size); - wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", - reg_start, reg_size); - } - - if ((mem_start < reg_start) && - ((mem_start + mem_size) > reg_start)) { - /* Guarantee that the memory partition doesn't overlap the - * registers partition */ - wl1251_debug(DEBUG_SPI, "End of partition[0] is " - "overlapping partition[1]. Adjusted."); - mem_size = reg_start - mem_start; - wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", - mem_start, mem_size); - wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", - reg_start, reg_size); - } else if ((reg_start < mem_start) && - ((reg_start + reg_size) > mem_start)) { - /* Guarantee that the register partition doesn't overlap the - * memory partition */ - wl1251_debug(DEBUG_SPI, "End of partition[1] is" - " overlapping partition[0]. Adjusted."); - reg_size = mem_start - reg_start; - wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", - mem_start, mem_size); - wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", - reg_start, reg_size); - } - - partition[0].start = mem_start; - partition[0].size = mem_size; - partition[1].start = reg_start; - partition[1].size = reg_size; - - wl->physical_mem_addr = mem_start; - wl->physical_reg_addr = reg_start; - - wl->virtual_mem_addr = 0; - wl->virtual_reg_addr = mem_size; - - t.tx_buf = cmd; - t.len = cmd_len; - spi_message_add_tail(&t, &m); - - spi_sync(wl->spi, &m); - - kfree(cmd); - - return 0; + wl1251_spi_reset(wl); + wl1251_spi_wake(wl); } -void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, - size_t len, bool fixed) +static void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, + size_t len) { struct spi_transfer t[3]; struct spi_message m; @@ -271,9 +151,6 @@ void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; *cmd |= addr & WSPI_CMD_BYTE_ADDR; - if (fixed) - *cmd |= WSPI_CMD_FIXED; - spi_message_init(&m); memset(t, 0, sizeof(t)); @@ -290,7 +167,7 @@ void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, t[2].len = len; spi_message_add_tail(&t[2], &m); - spi_sync(wl->spi, &m); + spi_sync(wl_to_spi(wl), &m); /* FIXME: check busy words */ @@ -298,8 +175,8 @@ void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len); } -void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, - size_t len, bool fixed) +static void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, + size_t len) { struct spi_transfer t[2]; struct spi_message m; @@ -312,9 +189,6 @@ void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; *cmd |= addr & WSPI_CMD_BYTE_ADDR; - if (fixed) - *cmd |= WSPI_CMD_FIXED; - spi_message_init(&m); memset(t, 0, sizeof(t)); @@ -326,68 +200,145 @@ void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, t[1].len = len; spi_message_add_tail(&t[1], &m); - spi_sync(wl->spi, &m); + spi_sync(wl_to_spi(wl), &m); wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd)); wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len); } -void wl1251_spi_mem_read(struct wl1251 *wl, int addr, void *buf, - size_t len) +static void wl1251_spi_enable_irq(struct wl1251 *wl) { - int physical; - - physical = wl1251_translate_mem_addr(wl, addr); + return enable_irq(wl->irq); +} - wl1251_spi_read(wl, physical, buf, len, false); +static void wl1251_spi_disable_irq(struct wl1251 *wl) +{ + return disable_irq(wl->irq); } -void wl1251_spi_mem_write(struct wl1251 *wl, int addr, void *buf, - size_t len) +static const struct wl1251_if_operations wl1251_spi_ops = { + .read = wl1251_spi_read, + .write = wl1251_spi_write, + .reset = wl1251_spi_reset_wake, + .enable_irq = wl1251_spi_enable_irq, + .disable_irq = wl1251_spi_disable_irq, +}; + +static int __devinit wl1251_spi_probe(struct spi_device *spi) { - int physical; + struct wl12xx_platform_data *pdata; + struct ieee80211_hw *hw; + struct wl1251 *wl; + int ret; + + pdata = spi->dev.platform_data; + if (!pdata) { + wl1251_error("no platform data"); + return -ENODEV; + } - physical = wl1251_translate_mem_addr(wl, addr); + hw = wl1251_alloc_hw(); + if (IS_ERR(hw)) + return PTR_ERR(hw); - wl1251_spi_write(wl, physical, buf, len, false); -} + wl = hw->priv; -void wl1251_spi_reg_read(struct wl1251 *wl, int addr, void *buf, size_t len, - bool fixed) -{ - int physical; + SET_IEEE80211_DEV(hw, &spi->dev); + dev_set_drvdata(&spi->dev, wl); + wl->if_priv = spi; + wl->if_ops = &wl1251_spi_ops; - physical = wl1251_translate_reg_addr(wl, addr); + /* This is the only SPI value that we need to set here, the rest + * comes from the board-peripherals file */ + spi->bits_per_word = 32; - wl1251_spi_read(wl, physical, buf, len, fixed); -} + ret = spi_setup(spi); + if (ret < 0) { + wl1251_error("spi_setup failed"); + goto out_free; + } -void wl1251_spi_reg_write(struct wl1251 *wl, int addr, void *buf, size_t len, - bool fixed) -{ - int physical; + wl->set_power = pdata->set_power; + if (!wl->set_power) { + wl1251_error("set power function missing in platform data"); + return -ENODEV; + } - physical = wl1251_translate_reg_addr(wl, addr); + wl->irq = spi->irq; + if (wl->irq < 0) { + wl1251_error("irq missing in platform data"); + return -ENODEV; + } - wl1251_spi_write(wl, physical, buf, len, fixed); -} + ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl); + if (ret < 0) { + wl1251_error("request_irq() failed: %d", ret); + goto out_free; + } -u32 wl1251_mem_read32(struct wl1251 *wl, int addr) -{ - return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr)); + set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); + + disable_irq(wl->irq); + + ret = wl1251_init_ieee80211(wl); + if (ret) + goto out_irq; + + return 0; + + out_irq: + free_irq(wl->irq, wl); + + out_free: + ieee80211_free_hw(hw); + + return ret; } -void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val) +static int __devexit wl1251_spi_remove(struct spi_device *spi) { - wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val); + struct wl1251 *wl = dev_get_drvdata(&spi->dev); + + free_irq(wl->irq, wl); + wl1251_free_hw(wl); + + return 0; } -u32 wl1251_reg_read32(struct wl1251 *wl, int addr) +static struct spi_driver wl1251_spi_driver = { + .driver = { + .name = "wl12xx", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + + .probe = wl1251_spi_probe, + .remove = __devexit_p(wl1251_spi_remove), +}; + +static int __init wl1251_spi_init(void) { - return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr)); + int ret; + + ret = spi_register_driver(&wl1251_spi_driver); + if (ret < 0) { + wl1251_error("failed to register spi driver: %d", ret); + goto out; + } + +out: + return ret; } -void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val) +static void __exit wl1251_spi_exit(void) { - wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val); + spi_unregister_driver(&wl1251_spi_driver); + + wl1251_notice("unloaded"); } + +module_init(wl1251_spi_init); +module_exit(wl1251_spi_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>"); |