diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_i2c.c | 767 |
1 files changed, 740 insertions, 27 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c index da3da1e89d00..5def6f5dff38 100644 --- a/drivers/gpu/drm/radeon/radeon_i2c.c +++ b/drivers/gpu/drm/radeon/radeon_i2c.c @@ -26,6 +26,7 @@ #include "drmP.h" #include "radeon_drm.h" #include "radeon.h" +#include "atom.h" /** * radeon_ddc_probe @@ -58,8 +59,9 @@ bool radeon_ddc_probe(struct radeon_connector *radeon_connector) return false; } +/* bit banging i2c */ -void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) +static void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) { struct radeon_device *rdev = i2c->dev->dev_private; struct radeon_i2c_bus_rec *rec = &i2c->rec; @@ -71,13 +73,25 @@ void radeon_i2c_do_lock(struct radeon_i2c_chan *i2c, int lock_state) */ if (rec->hw_capable) { if ((rdev->family >= CHIP_R200) && !ASIC_IS_AVIVO(rdev)) { - if (rec->a_clk_reg == RADEON_GPIO_MONID) { + u32 reg; + + if (rdev->family >= CHIP_RV350) + reg = RADEON_GPIO_MONID; + else if ((rdev->family == CHIP_R300) || + (rdev->family == CHIP_R350)) + reg = RADEON_GPIO_DVI_DDC; + else + reg = RADEON_GPIO_CRT2_DDC; + + mutex_lock(&rdev->dc_hw_i2c_mutex); + if (rec->a_clk_reg == reg) { WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1))); } else { WREG32(RADEON_DVI_I2C_CNTL_0, (RADEON_I2C_SOFT_RST | R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3))); } + mutex_unlock(&rdev->dc_hw_i2c_mutex); } } @@ -168,10 +182,692 @@ static void set_data(void *i2c_priv, int data) WREG32(rec->en_data_reg, val); } +static int pre_xfer(struct i2c_adapter *i2c_adap) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + + radeon_i2c_do_lock(i2c, 1); + + return 0; +} + +static void post_xfer(struct i2c_adapter *i2c_adap) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + + radeon_i2c_do_lock(i2c, 0); +} + +/* hw i2c */ + +static u32 radeon_get_i2c_prescale(struct radeon_device *rdev) +{ + u32 sclk = radeon_get_engine_clock(rdev); + u32 prescale = 0; + u32 nm; + u8 n, m, loop; + int i2c_clock; + + switch (rdev->family) { + case CHIP_R100: + case CHIP_RV100: + case CHIP_RS100: + case CHIP_RV200: + case CHIP_RS200: + case CHIP_R200: + case CHIP_RV250: + case CHIP_RS300: + case CHIP_RV280: + case CHIP_R300: + case CHIP_R350: + case CHIP_RV350: + i2c_clock = 60; + nm = (sclk * 10) / (i2c_clock * 4); + for (loop = 1; loop < 255; loop++) { + if ((nm / loop) < loop) + break; + } + n = loop - 1; + m = loop - 2; + prescale = m | (n << 8); + break; + case CHIP_RV380: + case CHIP_RS400: + case CHIP_RS480: + case CHIP_R420: + case CHIP_R423: + case CHIP_RV410: + prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128; + break; + case CHIP_RS600: + case CHIP_RS690: + case CHIP_RS740: + /* todo */ + break; + case CHIP_RV515: + case CHIP_R520: + case CHIP_RV530: + case CHIP_RV560: + case CHIP_RV570: + case CHIP_R580: + i2c_clock = 50; + if (rdev->family == CHIP_R520) + prescale = (127 << 8) + ((sclk * 10) / (4 * 127 * i2c_clock)); + else + prescale = (((sclk * 10)/(4 * 128 * 100) + 1) << 8) + 128; + break; + case CHIP_R600: + case CHIP_RV610: + case CHIP_RV630: + case CHIP_RV670: + /* todo */ + break; + case CHIP_RV620: + case CHIP_RV635: + case CHIP_RS780: + case CHIP_RS880: + case CHIP_RV770: + case CHIP_RV730: + case CHIP_RV710: + case CHIP_RV740: + /* todo */ + break; + case CHIP_CEDAR: + case CHIP_REDWOOD: + case CHIP_JUNIPER: + case CHIP_CYPRESS: + case CHIP_HEMLOCK: + /* todo */ + break; + default: + DRM_ERROR("i2c: unhandled radeon chip\n"); + break; + } + return prescale; +} + + +/* hw i2c engine for r1xx-4xx hardware + * hw can buffer up to 15 bytes + */ +static int r100_hw_i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg *msgs, int num) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + struct radeon_device *rdev = i2c->dev->dev_private; + struct radeon_i2c_bus_rec *rec = &i2c->rec; + struct i2c_msg *p; + int i, j, k, ret = num; + u32 prescale; + u32 i2c_cntl_0, i2c_cntl_1, i2c_data; + u32 tmp, reg; + + mutex_lock(&rdev->dc_hw_i2c_mutex); + /* take the pm lock since we need a constant sclk */ + mutex_lock(&rdev->pm.mutex); + + prescale = radeon_get_i2c_prescale(rdev); + + reg = ((prescale << RADEON_I2C_PRESCALE_SHIFT) | + RADEON_I2C_DRIVE_EN | + RADEON_I2C_START | + RADEON_I2C_STOP | + RADEON_I2C_GO); + + if (rdev->is_atom_bios) { + tmp = RREG32(RADEON_BIOS_6_SCRATCH); + WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE); + } + + if (rec->mm_i2c) { + i2c_cntl_0 = RADEON_I2C_CNTL_0; + i2c_cntl_1 = RADEON_I2C_CNTL_1; + i2c_data = RADEON_I2C_DATA; + } else { + i2c_cntl_0 = RADEON_DVI_I2C_CNTL_0; + i2c_cntl_1 = RADEON_DVI_I2C_CNTL_1; + i2c_data = RADEON_DVI_I2C_DATA; + + switch (rdev->family) { + case CHIP_R100: + case CHIP_RV100: + case CHIP_RS100: + case CHIP_RV200: + case CHIP_RS200: + case CHIP_RS300: + switch (rec->mask_clk_reg) { + case RADEON_GPIO_DVI_DDC: + /* no gpio select bit */ + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + break; + case CHIP_R200: + /* only bit 4 on r200 */ + switch (rec->mask_clk_reg) { + case RADEON_GPIO_DVI_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); + break; + case RADEON_GPIO_MONID: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + break; + case CHIP_RV250: + case CHIP_RV280: + /* bits 3 and 4 */ + switch (rec->mask_clk_reg) { + case RADEON_GPIO_DVI_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); + break; + case RADEON_GPIO_VGA_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2); + break; + case RADEON_GPIO_CRT2_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + break; + case CHIP_R300: + case CHIP_R350: + /* only bit 4 on r300/r350 */ + switch (rec->mask_clk_reg) { + case RADEON_GPIO_VGA_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); + break; + case RADEON_GPIO_DVI_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + break; + case CHIP_RV350: + case CHIP_RV380: + case CHIP_R420: + case CHIP_R423: + case CHIP_RV410: + case CHIP_RS400: + case CHIP_RS480: + /* bits 3 and 4 */ + switch (rec->mask_clk_reg) { + case RADEON_GPIO_VGA_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC1); + break; + case RADEON_GPIO_DVI_DDC: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC2); + break; + case RADEON_GPIO_MONID: + reg |= R200_DVI_I2C_PIN_SEL(R200_SEL_DDC3); + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + break; + default: + DRM_ERROR("unsupported asic\n"); + ret = -EINVAL; + goto done; + break; + } + } + + /* check for bus probe */ + p = &msgs[0]; + if ((num == 1) && (p->len == 0)) { + WREG32(i2c_cntl_0, (RADEON_I2C_DONE | + RADEON_I2C_NACK | + RADEON_I2C_HALT | + RADEON_I2C_SOFT_RST)); + WREG32(i2c_data, (p->addr << 1) & 0xff); + WREG32(i2c_data, 0); + WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | + (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | + RADEON_I2C_EN | + (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); + WREG32(i2c_cntl_0, reg); + for (k = 0; k < 32; k++) { + udelay(10); + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_GO) + continue; + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_DONE) + break; + else { + DRM_DEBUG("i2c write error 0x%08x\n", tmp); + WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); + ret = -EIO; + goto done; + } + } + goto done; + } + + for (i = 0; i < num; i++) { + p = &msgs[i]; + for (j = 0; j < p->len; j++) { + if (p->flags & I2C_M_RD) { + WREG32(i2c_cntl_0, (RADEON_I2C_DONE | + RADEON_I2C_NACK | + RADEON_I2C_HALT | + RADEON_I2C_SOFT_RST)); + WREG32(i2c_data, ((p->addr << 1) & 0xff) | 0x1); + WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | + (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | + RADEON_I2C_EN | + (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); + WREG32(i2c_cntl_0, reg | RADEON_I2C_RECEIVE); + for (k = 0; k < 32; k++) { + udelay(10); + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_GO) + continue; + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_DONE) + break; + else { + DRM_DEBUG("i2c read error 0x%08x\n", tmp); + WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); + ret = -EIO; + goto done; + } + } + p->buf[j] = RREG32(i2c_data) & 0xff; + } else { + WREG32(i2c_cntl_0, (RADEON_I2C_DONE | + RADEON_I2C_NACK | + RADEON_I2C_HALT | + RADEON_I2C_SOFT_RST)); + WREG32(i2c_data, (p->addr << 1) & 0xff); + WREG32(i2c_data, p->buf[j]); + WREG32(i2c_cntl_1, ((1 << RADEON_I2C_DATA_COUNT_SHIFT) | + (1 << RADEON_I2C_ADDR_COUNT_SHIFT) | + RADEON_I2C_EN | + (48 << RADEON_I2C_TIME_LIMIT_SHIFT))); + WREG32(i2c_cntl_0, reg); + for (k = 0; k < 32; k++) { + udelay(10); + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_GO) + continue; + tmp = RREG32(i2c_cntl_0); + if (tmp & RADEON_I2C_DONE) + break; + else { + DRM_DEBUG("i2c write error 0x%08x\n", tmp); + WREG32(i2c_cntl_0, tmp | RADEON_I2C_ABORT); + ret = -EIO; + goto done; + } + } + } + } + } + +done: + WREG32(i2c_cntl_0, 0); + WREG32(i2c_cntl_1, 0); + WREG32(i2c_cntl_0, (RADEON_I2C_DONE | + RADEON_I2C_NACK | + RADEON_I2C_HALT | + RADEON_I2C_SOFT_RST)); + + if (rdev->is_atom_bios) { + tmp = RREG32(RADEON_BIOS_6_SCRATCH); + tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE; + WREG32(RADEON_BIOS_6_SCRATCH, tmp); + } + + mutex_unlock(&rdev->pm.mutex); + mutex_unlock(&rdev->dc_hw_i2c_mutex); + + return ret; +} + +/* hw i2c engine for r5xx hardware + * hw can buffer up to 15 bytes + */ +static int r500_hw_i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg *msgs, int num) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + struct radeon_device *rdev = i2c->dev->dev_private; + struct radeon_i2c_bus_rec *rec = &i2c->rec; + struct i2c_msg *p; + int i, j, remaining, current_count, buffer_offset, ret = num; + u32 prescale; + u32 tmp, reg; + u32 saved1, saved2; + + mutex_lock(&rdev->dc_hw_i2c_mutex); + /* take the pm lock since we need a constant sclk */ + mutex_lock(&rdev->pm.mutex); + + prescale = radeon_get_i2c_prescale(rdev); + + /* clear gpio mask bits */ + tmp = RREG32(rec->mask_clk_reg); + tmp &= ~rec->mask_clk_mask; + WREG32(rec->mask_clk_reg, tmp); + tmp = RREG32(rec->mask_clk_reg); + + tmp = RREG32(rec->mask_data_reg); + tmp &= ~rec->mask_data_mask; + WREG32(rec->mask_data_reg, tmp); + tmp = RREG32(rec->mask_data_reg); + + /* clear pin values */ + tmp = RREG32(rec->a_clk_reg); + tmp &= ~rec->a_clk_mask; + WREG32(rec->a_clk_reg, tmp); + tmp = RREG32(rec->a_clk_reg); + + tmp = RREG32(rec->a_data_reg); + tmp &= ~rec->a_data_mask; + WREG32(rec->a_data_reg, tmp); + tmp = RREG32(rec->a_data_reg); + + /* set the pins to input */ + tmp = RREG32(rec->en_clk_reg); + tmp &= ~rec->en_clk_mask; + WREG32(rec->en_clk_reg, tmp); + tmp = RREG32(rec->en_clk_reg); + + tmp = RREG32(rec->en_data_reg); + tmp &= ~rec->en_data_mask; + WREG32(rec->en_data_reg, tmp); + tmp = RREG32(rec->en_data_reg); + + /* */ + tmp = RREG32(RADEON_BIOS_6_SCRATCH); + WREG32(RADEON_BIOS_6_SCRATCH, tmp | ATOM_S6_HW_I2C_BUSY_STATE); + saved1 = RREG32(AVIVO_DC_I2C_CONTROL1); + saved2 = RREG32(0x494); + WREG32(0x494, saved2 | 0x1); + + WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_WANTS_TO_USE_I2C); + for (i = 0; i < 50; i++) { + udelay(1); + if (RREG32(AVIVO_DC_I2C_ARBITRATION) & AVIVO_DC_I2C_SW_CAN_USE_I2C) + break; + } + if (i == 50) { + DRM_ERROR("failed to get i2c bus\n"); + ret = -EBUSY; + goto done; + } + + reg = AVIVO_DC_I2C_START | AVIVO_DC_I2C_STOP | AVIVO_DC_I2C_EN; + switch (rec->mask_clk_reg) { + case AVIVO_DC_GPIO_DDC1_MASK: + reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC1); + break; + case AVIVO_DC_GPIO_DDC2_MASK: + reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC2); + break; + case AVIVO_DC_GPIO_DDC3_MASK: + reg |= AVIVO_DC_I2C_PIN_SELECT(AVIVO_SEL_DDC3); + break; + default: + DRM_ERROR("gpio not supported with hw i2c\n"); + ret = -EINVAL; + goto done; + } + + /* check for bus probe */ + p = &msgs[0]; + if ((num == 1) && (p->len == 0)) { + WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | + AVIVO_DC_I2C_NACK | + AVIVO_DC_I2C_HALT)); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); + udelay(1); + WREG32(AVIVO_DC_I2C_RESET, 0); + + WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff); + WREG32(AVIVO_DC_I2C_DATA, 0); + + WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); + WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | + AVIVO_DC_I2C_DATA_COUNT(1) | + (prescale << 16))); + WREG32(AVIVO_DC_I2C_CONTROL1, reg); + WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); + for (j = 0; j < 200; j++) { + udelay(50); + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_GO) + continue; + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_DONE) + break; + else { + DRM_DEBUG("i2c write error 0x%08x\n", tmp); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); + ret = -EIO; + goto done; + } + } + goto done; + } + + for (i = 0; i < num; i++) { + p = &msgs[i]; + remaining = p->len; + buffer_offset = 0; + if (p->flags & I2C_M_RD) { + while (remaining) { + if (remaining > 15) + current_count = 15; + else + current_count = remaining; + WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | + AVIVO_DC_I2C_NACK | + AVIVO_DC_I2C_HALT)); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); + udelay(1); + WREG32(AVIVO_DC_I2C_RESET, 0); + + WREG32(AVIVO_DC_I2C_DATA, ((p->addr << 1) & 0xff) | 0x1); + WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); + WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | + AVIVO_DC_I2C_DATA_COUNT(current_count) | + (prescale << 16))); + WREG32(AVIVO_DC_I2C_CONTROL1, reg | AVIVO_DC_I2C_RECEIVE); + WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); + for (j = 0; j < 200; j++) { + udelay(50); + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_GO) + continue; + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_DONE) + break; + else { + DRM_DEBUG("i2c read error 0x%08x\n", tmp); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); + ret = -EIO; + goto done; + } + } + for (j = 0; j < current_count; j++) + p->buf[buffer_offset + j] = RREG32(AVIVO_DC_I2C_DATA) & 0xff; + remaining -= current_count; + buffer_offset += current_count; + } + } else { + while (remaining) { + if (remaining > 15) + current_count = 15; + else + current_count = remaining; + WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | + AVIVO_DC_I2C_NACK | + AVIVO_DC_I2C_HALT)); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); + udelay(1); + WREG32(AVIVO_DC_I2C_RESET, 0); + + WREG32(AVIVO_DC_I2C_DATA, (p->addr << 1) & 0xff); + for (j = 0; j < current_count; j++) + WREG32(AVIVO_DC_I2C_DATA, p->buf[buffer_offset + j]); + + WREG32(AVIVO_DC_I2C_CONTROL3, AVIVO_DC_I2C_TIME_LIMIT(48)); + WREG32(AVIVO_DC_I2C_CONTROL2, (AVIVO_DC_I2C_ADDR_COUNT(1) | + AVIVO_DC_I2C_DATA_COUNT(current_count) | + (prescale << 16))); + WREG32(AVIVO_DC_I2C_CONTROL1, reg); + WREG32(AVIVO_DC_I2C_STATUS1, AVIVO_DC_I2C_GO); + for (j = 0; j < 200; j++) { + udelay(50); + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_GO) + continue; + tmp = RREG32(AVIVO_DC_I2C_STATUS1); + if (tmp & AVIVO_DC_I2C_DONE) + break; + else { + DRM_DEBUG("i2c write error 0x%08x\n", tmp); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_ABORT); + ret = -EIO; + goto done; + } + } + remaining -= current_count; + buffer_offset += current_count; + } + } + } + +done: + WREG32(AVIVO_DC_I2C_STATUS1, (AVIVO_DC_I2C_DONE | + AVIVO_DC_I2C_NACK | + AVIVO_DC_I2C_HALT)); + WREG32(AVIVO_DC_I2C_RESET, AVIVO_DC_I2C_SOFT_RESET); + udelay(1); + WREG32(AVIVO_DC_I2C_RESET, 0); + + WREG32(AVIVO_DC_I2C_ARBITRATION, AVIVO_DC_I2C_SW_DONE_USING_I2C); + WREG32(AVIVO_DC_I2C_CONTROL1, saved1); + WREG32(0x494, saved2); + tmp = RREG32(RADEON_BIOS_6_SCRATCH); + tmp &= ~ATOM_S6_HW_I2C_BUSY_STATE; + WREG32(RADEON_BIOS_6_SCRATCH, tmp); + + mutex_unlock(&rdev->pm.mutex); + mutex_unlock(&rdev->dc_hw_i2c_mutex); + + return ret; +} + +static int radeon_hw_i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg *msgs, int num) +{ + struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap); + struct radeon_device *rdev = i2c->dev->dev_private; + struct radeon_i2c_bus_rec *rec = &i2c->rec; + int ret = 0; + + switch (rdev->family) { + case CHIP_R100: + case CHIP_RV100: + case CHIP_RS100: + case CHIP_RV200: + case CHIP_RS200: + case CHIP_R200: + case CHIP_RV250: + case CHIP_RS300: + case CHIP_RV280: + case CHIP_R300: + case CHIP_R350: + case CHIP_RV350: + case CHIP_RV380: + case CHIP_R420: + case CHIP_R423: + case CHIP_RV410: + case CHIP_RS400: + case CHIP_RS480: + ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); + break; + case CHIP_RS600: + case CHIP_RS690: + case CHIP_RS740: + /* XXX fill in hw i2c implementation */ + break; + case CHIP_RV515: + case CHIP_R520: + case CHIP_RV530: + case CHIP_RV560: + case CHIP_RV570: + case CHIP_R580: + if (rec->mm_i2c) + ret = r100_hw_i2c_xfer(i2c_adap, msgs, num); + else + ret = r500_hw_i2c_xfer(i2c_adap, msgs, num); + break; + case CHIP_R600: + case CHIP_RV610: + case CHIP_RV630: + case CHIP_RV670: + /* XXX fill in hw i2c implementation */ + break; + case CHIP_RV620: + case CHIP_RV635: + case CHIP_RS780: + case CHIP_RS880: + case CHIP_RV770: + case CHIP_RV730: + case CHIP_RV710: + case CHIP_RV740: + /* XXX fill in hw i2c implementation */ + break; + case CHIP_CEDAR: + case CHIP_REDWOOD: + case CHIP_JUNIPER: + case CHIP_CYPRESS: + case CHIP_HEMLOCK: + /* XXX fill in hw i2c implementation */ + break; + default: + DRM_ERROR("i2c: unhandled radeon chip\n"); + ret = -EIO; + break; + } + + return ret; +} + +static u32 radeon_hw_i2c_func(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm radeon_i2c_algo = { + .master_xfer = radeon_hw_i2c_xfer, + .functionality = radeon_hw_i2c_func, +}; + struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, struct radeon_i2c_bus_rec *rec, const char *name) { + struct radeon_device *rdev = dev->dev_private; struct radeon_i2c_chan *i2c; int ret; @@ -179,24 +875,43 @@ struct radeon_i2c_chan *radeon_i2c_create(struct drm_device *dev, if (i2c == NULL) return NULL; + i2c->rec = *rec; i2c->adapter.owner = THIS_MODULE; i2c->dev = dev; i2c_set_adapdata(&i2c->adapter, i2c); - i2c->adapter.algo_data = &i2c->algo.bit; - i2c->algo.bit.setsda = set_data; - i2c->algo.bit.setscl = set_clock; - i2c->algo.bit.getsda = get_data; - i2c->algo.bit.getscl = get_clock; - i2c->algo.bit.udelay = 20; - /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always - * make this, 2 jiffies is a lot more reliable */ - i2c->algo.bit.timeout = 2; - i2c->algo.bit.data = i2c; - i2c->rec = *rec; - ret = i2c_bit_add_bus(&i2c->adapter); - if (ret) { - DRM_INFO("Failed to register i2c %s\n", name); - goto out_free; + if (rec->mm_i2c || + (rec->hw_capable && + radeon_hw_i2c && + ((rdev->family <= CHIP_RS480) || + ((rdev->family >= CHIP_RV515) && (rdev->family <= CHIP_R580))))) { + /* set the radeon hw i2c adapter */ + sprintf(i2c->adapter.name, "Radeon i2c hw bus %s", name); + i2c->adapter.algo = &radeon_i2c_algo; + ret = i2c_add_adapter(&i2c->adapter); + if (ret) { + DRM_ERROR("Failed to register hw i2c %s\n", name); + goto out_free; + } + } else { + /* set the radeon bit adapter */ + sprintf(i2c->adapter.name, "Radeon i2c bit bus %s", name); + i2c->adapter.algo_data = &i2c->algo.bit; + i2c->algo.bit.pre_xfer = pre_xfer; + i2c->algo.bit.post_xfer = post_xfer; + i2c->algo.bit.setsda = set_data; + i2c->algo.bit.setscl = set_clock; + i2c->algo.bit.getsda = get_data; + i2c->algo.bit.getscl = get_clock; + i2c->algo.bit.udelay = 20; + /* vesa says 2.2 ms is enough, 1 jiffy doesn't seem to always + * make this, 2 jiffies is a lot more reliable */ + i2c->algo.bit.timeout = 2; + i2c->algo.bit.data = i2c; + ret = i2c_bit_add_bus(&i2c->adapter); + if (ret) { + DRM_ERROR("Failed to register bit i2c %s\n", name); + goto out_free; + } } return i2c; @@ -237,12 +952,10 @@ out_free: } - void radeon_i2c_destroy(struct radeon_i2c_chan *i2c) { if (!i2c) return; - i2c_del_adapter(&i2c->adapter); kfree(i2c); } @@ -252,10 +965,10 @@ struct drm_encoder *radeon_best_encoder(struct drm_connector *connector) return NULL; } -void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus, - u8 slave_addr, - u8 addr, - u8 *val) +void radeon_i2c_get_byte(struct radeon_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 *val) { u8 out_buf[2]; u8 in_buf[2]; @@ -286,10 +999,10 @@ void radeon_i2c_sw_get_byte(struct radeon_i2c_chan *i2c_bus, } } -void radeon_i2c_sw_put_byte(struct radeon_i2c_chan *i2c_bus, - u8 slave_addr, - u8 addr, - u8 val) +void radeon_i2c_put_byte(struct radeon_i2c_chan *i2c_bus, + u8 slave_addr, + u8 addr, + u8 val) { uint8_t out_buf[2]; struct i2c_msg msg = { |