diff options
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2500usb.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2500usb.c | 140 |
1 files changed, 60 insertions, 80 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c index e6bae4ae4c4..40eb6435882 100644 --- a/drivers/net/wireless/rt2x00/rt2500usb.c +++ b/drivers/net/wireless/rt2x00/rt2500usb.c @@ -57,7 +57,7 @@ static inline void rt2500usb_register_read(struct rt2x00_dev *rt2x00dev, __le16 reg; rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ, USB_VENDOR_REQUEST_IN, offset, - ®, sizeof(u16), REGISTER_TIMEOUT); + ®, sizeof(reg), REGISTER_TIMEOUT); *value = le16_to_cpu(reg); } @@ -68,7 +68,7 @@ static inline void rt2500usb_register_read_lock(struct rt2x00_dev *rt2x00dev, __le16 reg; rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ, USB_VENDOR_REQUEST_IN, offset, - ®, sizeof(u16), REGISTER_TIMEOUT); + ®, sizeof(reg), REGISTER_TIMEOUT); *value = le16_to_cpu(reg); } @@ -89,7 +89,7 @@ static inline void rt2500usb_register_write(struct rt2x00_dev *rt2x00dev, __le16 reg = cpu_to_le16(value); rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE, USB_VENDOR_REQUEST_OUT, offset, - ®, sizeof(u16), REGISTER_TIMEOUT); + ®, sizeof(reg), REGISTER_TIMEOUT); } static inline void rt2500usb_register_write_lock(struct rt2x00_dev *rt2x00dev, @@ -99,7 +99,7 @@ static inline void rt2500usb_register_write_lock(struct rt2x00_dev *rt2x00dev, __le16 reg = cpu_to_le16(value); rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE, USB_VENDOR_REQUEST_OUT, offset, - ®, sizeof(u16), REGISTER_TIMEOUT); + ®, sizeof(reg), REGISTER_TIMEOUT); } static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev, @@ -112,21 +112,32 @@ static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev, REGISTER_TIMEOUT16(length)); } -static u16 rt2500usb_bbp_check(struct rt2x00_dev *rt2x00dev) +static int rt2500usb_regbusy_read(struct rt2x00_dev *rt2x00dev, + const unsigned int offset, + struct rt2x00_field16 field, + u16 *reg) { - u16 reg; unsigned int i; for (i = 0; i < REGISTER_BUSY_COUNT; i++) { - rt2500usb_register_read_lock(rt2x00dev, PHY_CSR8, ®); - if (!rt2x00_get_field16(reg, PHY_CSR8_BUSY)) - break; + rt2500usb_register_read_lock(rt2x00dev, offset, reg); + if (!rt2x00_get_field16(*reg, field)) + return 1; udelay(REGISTER_BUSY_DELAY); } - return reg; + ERROR(rt2x00dev, "Indirect register access failed: " + "offset=0x%.08x, value=0x%.08x\n", offset, *reg); + *reg = ~0; + + return 0; } +#define WAIT_FOR_BBP(__dev, __reg) \ + rt2500usb_regbusy_read((__dev), PHY_CSR8, PHY_CSR8_BUSY, (__reg)) +#define WAIT_FOR_RF(__dev, __reg) \ + rt2500usb_regbusy_read((__dev), PHY_CSR10, PHY_CSR10_RF_BUSY, (__reg)) + static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev, const unsigned int word, const u8 value) { @@ -135,30 +146,19 @@ static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev, mutex_lock(&rt2x00dev->csr_mutex); /* - * Wait until the BBP becomes ready. - */ - reg = rt2500usb_bbp_check(rt2x00dev); - if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) - goto exit_fail; - - /* - * Write the data into the BBP. + * Wait until the BBP becomes available, afterwards we + * can safely write the new data into the register. */ - reg = 0; - rt2x00_set_field16(®, PHY_CSR7_DATA, value); - rt2x00_set_field16(®, PHY_CSR7_REG_ID, word); - rt2x00_set_field16(®, PHY_CSR7_READ_CONTROL, 0); - - rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg); - - mutex_unlock(&rt2x00dev->csr_mutex); + if (WAIT_FOR_BBP(rt2x00dev, ®)) { + reg = 0; + rt2x00_set_field16(®, PHY_CSR7_DATA, value); + rt2x00_set_field16(®, PHY_CSR7_REG_ID, word); + rt2x00_set_field16(®, PHY_CSR7_READ_CONTROL, 0); - return; + rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg); + } -exit_fail: mutex_unlock(&rt2x00dev->csr_mutex); - - ERROR(rt2x00dev, "PHY_CSR8 register busy. Write failed.\n"); } static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev, @@ -169,77 +169,57 @@ static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev, mutex_lock(&rt2x00dev->csr_mutex); /* - * Wait until the BBP becomes ready. - */ - reg = rt2500usb_bbp_check(rt2x00dev); - if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) - goto exit_fail; - - /* - * Write the request into the BBP. + * Wait until the BBP becomes available, afterwards we + * can safely write the read request into the register. + * After the data has been written, we wait until hardware + * returns the correct value, if at any time the register + * doesn't become available in time, reg will be 0xffffffff + * which means we return 0xff to the caller. */ - reg = 0; - rt2x00_set_field16(®, PHY_CSR7_REG_ID, word); - rt2x00_set_field16(®, PHY_CSR7_READ_CONTROL, 1); + if (WAIT_FOR_BBP(rt2x00dev, ®)) { + reg = 0; + rt2x00_set_field16(®, PHY_CSR7_REG_ID, word); + rt2x00_set_field16(®, PHY_CSR7_READ_CONTROL, 1); - rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg); + rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg); - /* - * Wait until the BBP becomes ready. - */ - reg = rt2500usb_bbp_check(rt2x00dev); - if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) - goto exit_fail; + if (WAIT_FOR_BBP(rt2x00dev, ®)) + rt2500usb_register_read_lock(rt2x00dev, PHY_CSR7, ®); + } - rt2500usb_register_read_lock(rt2x00dev, PHY_CSR7, ®); *value = rt2x00_get_field16(reg, PHY_CSR7_DATA); mutex_unlock(&rt2x00dev->csr_mutex); - - return; - -exit_fail: - mutex_unlock(&rt2x00dev->csr_mutex); - - ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n"); - *value = 0xff; } static void rt2500usb_rf_write(struct rt2x00_dev *rt2x00dev, const unsigned int word, const u32 value) { u16 reg; - unsigned int i; if (!word) return; mutex_lock(&rt2x00dev->csr_mutex); - for (i = 0; i < REGISTER_BUSY_COUNT; i++) { - rt2500usb_register_read_lock(rt2x00dev, PHY_CSR10, ®); - if (!rt2x00_get_field16(reg, PHY_CSR10_RF_BUSY)) - goto rf_write; - udelay(REGISTER_BUSY_DELAY); - } - - mutex_unlock(&rt2x00dev->csr_mutex); - ERROR(rt2x00dev, "PHY_CSR10 register busy. Write failed.\n"); - return; - -rf_write: - reg = 0; - rt2x00_set_field16(®, PHY_CSR9_RF_VALUE, value); - rt2500usb_register_write_lock(rt2x00dev, PHY_CSR9, reg); + /* + * Wait until the RF becomes available, afterwards we + * can safely write the new data into the register. + */ + if (WAIT_FOR_RF(rt2x00dev, ®)) { + reg = 0; + rt2x00_set_field16(®, PHY_CSR9_RF_VALUE, value); + rt2500usb_register_write_lock(rt2x00dev, PHY_CSR9, reg); - reg = 0; - rt2x00_set_field16(®, PHY_CSR10_RF_VALUE, value >> 16); - rt2x00_set_field16(®, PHY_CSR10_RF_NUMBER_OF_BITS, 20); - rt2x00_set_field16(®, PHY_CSR10_RF_IF_SELECT, 0); - rt2x00_set_field16(®, PHY_CSR10_RF_BUSY, 1); + reg = 0; + rt2x00_set_field16(®, PHY_CSR10_RF_VALUE, value >> 16); + rt2x00_set_field16(®, PHY_CSR10_RF_NUMBER_OF_BITS, 20); + rt2x00_set_field16(®, PHY_CSR10_RF_IF_SELECT, 0); + rt2x00_set_field16(®, PHY_CSR10_RF_BUSY, 1); - rt2500usb_register_write_lock(rt2x00dev, PHY_CSR10, reg); - rt2x00_rf_write(rt2x00dev, word, value); + rt2500usb_register_write_lock(rt2x00dev, PHY_CSR10, reg); + rt2x00_rf_write(rt2x00dev, word, value); + } mutex_unlock(&rt2x00dev->csr_mutex); } |