Lines Matching +full:i2s +full:- +full:regs
1 // SPDX-License-Identifier: GPL-2.0+
3 * Intel Broadwell I2S driver
7 * Modified from dc i2s/broadwell/broadwell.c
14 #include <i2s.h>
29 uint sclk_dummy_stop; /* 0-31 */
30 uint sclk_frame_width; /* 1-38 */
32 struct broadwell_i2s_regs *regs; member
43 clrsetbits_le32(&priv->shim->csr, in init_shim_csr()
54 u32 clkctl = readl(&priv->shim->clkctl); in init_shim_clkctl()
61 if (uc_priv->id) in init_shim_clkctl()
66 writel(clkctl, &priv->shim->clkctl); in init_shim_clkctl()
76 if (uc_priv->bitspersample > 16) in init_sscr0()
77 sscr0 = (uc_priv->bitspersample - 16 - 1) << SSP_SSC0_DSS_SHIFT in init_sscr0()
80 sscr0 = (uc_priv->bitspersample - 1) << SSP_SSC0_DSS_SHIFT; in init_sscr0()
93 scale = uc_priv->audio_pll_clk / uc_priv->samplingrate / uc_priv->bfs; in init_sscr0()
96 writel(sscr0, &priv->regs->sscr0); in init_sscr0()
101 u32 sscr1 = readl(&priv->regs->sscr1); in init_sscr1()
105 /* Set as I2S master */ in init_sscr1()
125 writel(sscr1, &priv->regs->sscr1); in init_sscr1()
130 u32 sspsp = readl(&priv->regs->sspsp); in init_sspsp()
133 sspsp |= priv->sclk_mode << SSP_PSP_SCMODE_SHIFT; in init_sspsp()
134 sspsp |= (priv->sclk_dummy_stop << SSP_PSP_DMYSTOP_SHIFT) & in init_sspsp()
136 sspsp |= (priv->sclk_dummy_stop >> 2 << SSP_PSP_EDYMSTOP_SHIFT) & in init_sspsp()
138 sspsp |= priv->sclk_frame_width << SSP_PSP_SFRMWDTH_SHIFT; in init_sspsp()
141 if (priv->rel_timing == NEXT_FRMS_AFTER_END_OF_T4) in init_sspsp()
147 if (priv->sfrm_polarity == SSP_FRMS_ACTIVE_HIGH) in init_sspsp()
153 if (priv->end_transfer_state == SSP_END_TRANSFER_STATE_LOW) in init_sspsp()
158 writel(sspsp, &priv->regs->sspsp); in init_sspsp()
163 writel(3, &priv->regs->sstsa); in init_ssp_time_slot()
164 writel(3, &priv->regs->ssrsa); in init_ssp_time_slot()
184 setbits_le32(&priv->regs->sscr0, SSP_SSC0_SSE); in bdw_i2s_enable()
185 setbits_le32(&priv->regs->sstsa, SSP_SSTSA_EN); in bdw_i2s_enable()
190 clrbits_le32(&priv->regs->sstsa, SSP_SSTSA_EN); in bdw_i2s_disable()
191 clrbits_le32(&priv->regs->sstsa, SSP_SSTSA_EN); in bdw_i2s_disable()
202 log_err("Invalid I2S data size\n"); in broadwell_i2s_tx_data()
203 return -ENODATA; in broadwell_i2s_tx_data()
206 /* Enable I2S interface */ in broadwell_i2s_tx_data()
214 if (readl(&priv->regs->sssr) & SSP_SSS_TNF) { in broadwell_i2s_tx_data()
215 writel(*ptr++, &priv->regs->ssdr); in broadwell_i2s_tx_data()
216 data_size -= sizeof(*ptr); in broadwell_i2s_tx_data()
218 if ((long)(timer_get_us() - start) > 0) { in broadwell_i2s_tx_data()
219 /* Disable I2S interface */ in broadwell_i2s_tx_data()
221 log_debug("I2S Transfer Timeout\n"); in broadwell_i2s_tx_data()
222 return -ETIMEDOUT; in broadwell_i2s_tx_data()
227 /* Disable I2S interface */ in broadwell_i2s_tx_data()
245 return -EINVAL; in broadwell_i2s_probe()
250 return -EINVAL; in broadwell_i2s_probe()
252 uc_priv->base_address = bar0 + offset; in broadwell_i2s_probe()
255 * Hard-code these values. If other settings are required we can add in broadwell_i2s_probe()
258 uc_priv->rfs = 64; in broadwell_i2s_probe()
259 uc_priv->bfs = 32; in broadwell_i2s_probe()
260 uc_priv->audio_pll_clk = 24 * 1000 * 1000; in broadwell_i2s_probe()
261 uc_priv->samplingrate = 48000; in broadwell_i2s_probe()
262 uc_priv->bitspersample = 16; in broadwell_i2s_probe()
263 uc_priv->channels = 2; in broadwell_i2s_probe()
264 uc_priv->id = 0; in broadwell_i2s_probe()
266 priv->shim = (struct i2s_shim_regs *)uc_priv->base_address; in broadwell_i2s_probe()
267 priv->sfrm_polarity = SSP_FRMS_ACTIVE_LOW; in broadwell_i2s_probe()
268 priv->end_transfer_state = SSP_END_TRANSFER_STATE_LOW; in broadwell_i2s_probe()
269 priv->sclk_mode = SCLK_MODE_DDF_DSR_ISL; in broadwell_i2s_probe()
270 priv->rel_timing = NEXT_FRMS_WITH_LSB_PREVIOUS_FRM; in broadwell_i2s_probe()
271 priv->sclk_dummy_stop = 0; in broadwell_i2s_probe()
272 priv->sclk_frame_width = 31; in broadwell_i2s_probe()
274 offset = dev_read_addr_index(dev, 1 + uc_priv->id); in broadwell_i2s_probe()
276 log_debug("Cannot read address index %d\n", 1 + uc_priv->id); in broadwell_i2s_probe()
277 return -EINVAL; in broadwell_i2s_probe()
279 log_debug("bar0=%x, uc_priv->base_address=%x, offset=%x\n", bar0, in broadwell_i2s_probe()
280 uc_priv->base_address, offset); in broadwell_i2s_probe()
281 priv->regs = (struct broadwell_i2s_regs *)(bar0 + offset); in broadwell_i2s_probe()
295 { .compatible = "intel,broadwell-i2s" },