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path: root/drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c
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Diffstat (limited to 'drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c')
-rw-r--r--drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c1096
1 files changed, 0 insertions, 1096 deletions
diff --git a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c b/drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c
deleted file mode 100644
index f847376d501e..000000000000
--- a/drivers/gpu/drm/msm/dsi/pll/dsi_pll_14nm.c
+++ /dev/null
@@ -1,1096 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2016, The Linux Foundation. All rights reserved.
- */
-
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-
-#include "dsi_pll.h"
-#include "dsi.xml.h"
-
-/*
- * DSI PLL 14nm - clock diagram (eg: DSI0):
- *
- * dsi0n1_postdiv_clk
- * |
- * |
- * +----+ | +----+
- * dsi0vco_clk ---| n1 |--o--| /8 |-- dsi0pllbyte
- * +----+ | +----+
- * | dsi0n1_postdivby2_clk
- * | +----+ |
- * o---| /2 |--o--|\
- * | +----+ | \ +----+
- * | | |--| n2 |-- dsi0pll
- * o--------------| / +----+
- * |/
- */
-
-#define POLL_MAX_READS 15
-#define POLL_TIMEOUT_US 1000
-
-#define NUM_PROVIDED_CLKS 2
-
-#define VCO_REF_CLK_RATE 19200000
-#define VCO_MIN_RATE 1300000000UL
-#define VCO_MAX_RATE 2600000000UL
-
-#define DSI_BYTE_PLL_CLK 0
-#define DSI_PIXEL_PLL_CLK 1
-
-#define DSI_PLL_DEFAULT_VCO_POSTDIV 1
-
-struct dsi_pll_input {
- u32 fref; /* reference clk */
- u32 fdata; /* bit clock rate */
- u32 dsiclk_sel; /* Mux configuration (see diagram) */
- u32 ssc_en; /* SSC enable/disable */
- u32 ldo_en;
-
- /* fixed params */
- u32 refclk_dbler_en;
- u32 vco_measure_time;
- u32 kvco_measure_time;
- u32 bandgap_timer;
- u32 pll_wakeup_timer;
- u32 plllock_cnt;
- u32 plllock_rng;
- u32 ssc_center;
- u32 ssc_adj_period;
- u32 ssc_spread;
- u32 ssc_freq;
- u32 pll_ie_trim;
- u32 pll_ip_trim;
- u32 pll_iptat_trim;
- u32 pll_cpcset_cur;
- u32 pll_cpmset_cur;
-
- u32 pll_icpmset;
- u32 pll_icpcset;
-
- u32 pll_icpmset_p;
- u32 pll_icpmset_m;
-
- u32 pll_icpcset_p;
- u32 pll_icpcset_m;
-
- u32 pll_lpf_res1;
- u32 pll_lpf_cap1;
- u32 pll_lpf_cap2;
- u32 pll_c3ctrl;
- u32 pll_r3ctrl;
-};
-
-struct dsi_pll_output {
- u32 pll_txclk_en;
- u32 dec_start;
- u32 div_frac_start;
- u32 ssc_period;
- u32 ssc_step_size;
- u32 plllock_cmp;
- u32 pll_vco_div_ref;
- u32 pll_vco_count;
- u32 pll_kvco_div_ref;
- u32 pll_kvco_count;
- u32 pll_misc1;
- u32 pll_lpf2_postdiv;
- u32 pll_resetsm_cntrl;
- u32 pll_resetsm_cntrl2;
- u32 pll_resetsm_cntrl5;
- u32 pll_kvco_code;
-
- u32 cmn_clk_cfg0;
- u32 cmn_clk_cfg1;
- u32 cmn_ldo_cntrl;
-
- u32 pll_postdiv;
- u32 fcvo;
-};
-
-struct pll_14nm_cached_state {
- unsigned long vco_rate;
- u8 n2postdiv;
- u8 n1postdiv;
-};
-
-struct dsi_pll_14nm {
- struct msm_dsi_pll base;
-
- int id;
- struct platform_device *pdev;
-
- void __iomem *phy_cmn_mmio;
- void __iomem *mmio;
-
- int vco_delay;
-
- struct dsi_pll_input in;
- struct dsi_pll_output out;
-
- /* protects REG_DSI_14nm_PHY_CMN_CLK_CFG0 register */
- spinlock_t postdiv_lock;
-
- u64 vco_current_rate;
- u64 vco_ref_clk_rate;
-
- /* private clocks: */
- struct clk_hw *hws[NUM_DSI_CLOCKS_MAX];
- u32 num_hws;
-
- /* clock-provider: */
- struct clk_hw_onecell_data *hw_data;
-
- struct pll_14nm_cached_state cached_state;
-
- enum msm_dsi_phy_usecase uc;
- struct dsi_pll_14nm *slave;
-};
-
-#define to_pll_14nm(x) container_of(x, struct dsi_pll_14nm, base)
-
-/*
- * Private struct for N1/N2 post-divider clocks. These clocks are similar to
- * the generic clk_divider class of clocks. The only difference is that it
- * also sets the slave DSI PLL's post-dividers if in Dual DSI mode
- */
-struct dsi_pll_14nm_postdiv {
- struct clk_hw hw;
-
- /* divider params */
- u8 shift;
- u8 width;
- u8 flags; /* same flags as used by clk_divider struct */
-
- struct dsi_pll_14nm *pll;
-};
-
-#define to_pll_14nm_postdiv(_hw) container_of(_hw, struct dsi_pll_14nm_postdiv, hw)
-
-/*
- * Global list of private DSI PLL struct pointers. We need this for Dual DSI
- * mode, where the master PLL's clk_ops needs access the slave's private data
- */
-static struct dsi_pll_14nm *pll_14nm_list[DSI_MAX];
-
-static bool pll_14nm_poll_for_ready(struct dsi_pll_14nm *pll_14nm,
- u32 nb_tries, u32 timeout_us)
-{
- bool pll_locked = false;
- void __iomem *base = pll_14nm->mmio;
- u32 tries, val;
-
- tries = nb_tries;
- while (tries--) {
- val = pll_read(base +
- REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS);
- pll_locked = !!(val & BIT(5));
-
- if (pll_locked)
- break;
-
- udelay(timeout_us);
- }
-
- if (!pll_locked) {
- tries = nb_tries;
- while (tries--) {
- val = pll_read(base +
- REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS);
- pll_locked = !!(val & BIT(0));
-
- if (pll_locked)
- break;
-
- udelay(timeout_us);
- }
- }
-
- DBG("DSI PLL is %slocked", pll_locked ? "" : "*not* ");
-
- return pll_locked;
-}
-
-static void dsi_pll_14nm_input_init(struct dsi_pll_14nm *pll)
-{
- pll->in.fref = pll->vco_ref_clk_rate;
- pll->in.fdata = 0;
- pll->in.dsiclk_sel = 1; /* Use the /2 path in Mux */
- pll->in.ldo_en = 0; /* disabled for now */
-
- /* fixed input */
- pll->in.refclk_dbler_en = 0;
- pll->in.vco_measure_time = 5;
- pll->in.kvco_measure_time = 5;
- pll->in.bandgap_timer = 4;
- pll->in.pll_wakeup_timer = 5;
- pll->in.plllock_cnt = 1;
- pll->in.plllock_rng = 0;
-
- /*
- * SSC is enabled by default. We might need DT props for configuring
- * some SSC params like PPM and center/down spread etc.
- */
- pll->in.ssc_en = 1;
- pll->in.ssc_center = 0; /* down spread by default */
- pll->in.ssc_spread = 5; /* PPM / 1000 */
- pll->in.ssc_freq = 31500; /* default recommended */
- pll->in.ssc_adj_period = 37;
-
- pll->in.pll_ie_trim = 4;
- pll->in.pll_ip_trim = 4;
- pll->in.pll_cpcset_cur = 1;
- pll->in.pll_cpmset_cur = 1;
- pll->in.pll_icpmset = 4;
- pll->in.pll_icpcset = 4;
- pll->in.pll_icpmset_p = 0;
- pll->in.pll_icpmset_m = 0;
- pll->in.pll_icpcset_p = 0;
- pll->in.pll_icpcset_m = 0;
- pll->in.pll_lpf_res1 = 3;
- pll->in.pll_lpf_cap1 = 11;
- pll->in.pll_lpf_cap2 = 1;
- pll->in.pll_iptat_trim = 7;
- pll->in.pll_c3ctrl = 2;
- pll->in.pll_r3ctrl = 1;
-}
-
-#define CEIL(x, y) (((x) + ((y) - 1)) / (y))
-
-static void pll_14nm_ssc_calc(struct dsi_pll_14nm *pll)
-{
- u32 period, ssc_period;
- u32 ref, rem;
- u64 step_size;
-
- DBG("vco=%lld ref=%lld", pll->vco_current_rate, pll->vco_ref_clk_rate);
-
- ssc_period = pll->in.ssc_freq / 500;
- period = (u32)pll->vco_ref_clk_rate / 1000;
- ssc_period = CEIL(period, ssc_period);
- ssc_period -= 1;
- pll->out.ssc_period = ssc_period;
-
- DBG("ssc freq=%d spread=%d period=%d", pll->in.ssc_freq,
- pll->in.ssc_spread, pll->out.ssc_period);
-
- step_size = (u32)pll->vco_current_rate;
- ref = pll->vco_ref_clk_rate;
- ref /= 1000;
- step_size = div_u64(step_size, ref);
- step_size <<= 20;
- step_size = div_u64(step_size, 1000);
- step_size *= pll->in.ssc_spread;
- step_size = div_u64(step_size, 1000);
- step_size *= (pll->in.ssc_adj_period + 1);
-
- rem = 0;
- step_size = div_u64_rem(step_size, ssc_period + 1, &rem);
- if (rem)
- step_size++;
-
- DBG("step_size=%lld", step_size);
-
- step_size &= 0x0ffff; /* take lower 16 bits */
-
- pll->out.ssc_step_size = step_size;
-}
-
-static void pll_14nm_dec_frac_calc(struct dsi_pll_14nm *pll)
-{
- struct dsi_pll_input *pin = &pll->in;
- struct dsi_pll_output *pout = &pll->out;
- u64 multiplier = BIT(20);
- u64 dec_start_multiple, dec_start, pll_comp_val;
- u32 duration, div_frac_start;
- u64 vco_clk_rate = pll->vco_current_rate;
- u64 fref = pll->vco_ref_clk_rate;
-
- DBG("vco_clk_rate=%lld ref_clk_rate=%lld", vco_clk_rate, fref);
-
- dec_start_multiple = div_u64(vco_clk_rate * multiplier, fref);
- div_u64_rem(dec_start_multiple, multiplier, &div_frac_start);
-
- dec_start = div_u64(dec_start_multiple, multiplier);
-
- pout->dec_start = (u32)dec_start;
- pout->div_frac_start = div_frac_start;
-
- if (pin->plllock_cnt == 0)
- duration = 1024;
- else if (pin->plllock_cnt == 1)
- duration = 256;
- else if (pin->plllock_cnt == 2)
- duration = 128;
- else
- duration = 32;
-
- pll_comp_val = duration * dec_start_multiple;
- pll_comp_val = div_u64(pll_comp_val, multiplier);
- do_div(pll_comp_val, 10);
-
- pout->plllock_cmp = (u32)pll_comp_val;
-
- pout->pll_txclk_en = 1;
- pout->cmn_ldo_cntrl = 0x3c;
-}
-
-static u32 pll_14nm_kvco_slop(u32 vrate)
-{
- u32 slop = 0;
-
- if (vrate > VCO_MIN_RATE && vrate <= 1800000000UL)
- slop = 600;
- else if (vrate > 1800000000UL && vrate < 2300000000UL)
- slop = 400;
- else if (vrate > 2300000000UL && vrate < VCO_MAX_RATE)
- slop = 280;
-
- return slop;
-}
-
-static void pll_14nm_calc_vco_count(struct dsi_pll_14nm *pll)
-{
- struct dsi_pll_input *pin = &pll->in;
- struct dsi_pll_output *pout = &pll->out;
- u64 vco_clk_rate = pll->vco_current_rate;
- u64 fref = pll->vco_ref_clk_rate;
- u64 data;
- u32 cnt;
-
- data = fref * pin->vco_measure_time;
- do_div(data, 1000000);
- data &= 0x03ff; /* 10 bits */
- data -= 2;
- pout->pll_vco_div_ref = data;
-
- data = div_u64(vco_clk_rate, 1000000); /* unit is Mhz */
- data *= pin->vco_measure_time;
- do_div(data, 10);
- pout->pll_vco_count = data;
-
- data = fref * pin->kvco_measure_time;
- do_div(data, 1000000);
- data &= 0x03ff; /* 10 bits */
- data -= 1;
- pout->pll_kvco_div_ref = data;
-
- cnt = pll_14nm_kvco_slop(vco_clk_rate);
- cnt *= 2;
- cnt /= 100;
- cnt *= pin->kvco_measure_time;
- pout->pll_kvco_count = cnt;
-
- pout->pll_misc1 = 16;
- pout->pll_resetsm_cntrl = 48;
- pout->pll_resetsm_cntrl2 = pin->bandgap_timer << 3;
- pout->pll_resetsm_cntrl5 = pin->pll_wakeup_timer;
- pout->pll_kvco_code = 0;
-}
-
-static void pll_db_commit_ssc(struct dsi_pll_14nm *pll)
-{
- void __iomem *base = pll->mmio;
- struct dsi_pll_input *pin = &pll->in;
- struct dsi_pll_output *pout = &pll->out;
- u8 data;
-
- data = pin->ssc_adj_period;
- data &= 0x0ff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER1, data);
- data = (pin->ssc_adj_period >> 8);
- data &= 0x03;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER2, data);
-
- data = pout->ssc_period;
- data &= 0x0ff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER1, data);
- data = (pout->ssc_period >> 8);
- data &= 0x0ff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER2, data);
-
- data = pout->ssc_step_size;
- data &= 0x0ff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE1, data);
- data = (pout->ssc_step_size >> 8);
- data &= 0x0ff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE2, data);
-
- data = (pin->ssc_center & 0x01);
- data <<= 1;
- data |= 0x01; /* enable */
- pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_EN_CENTER, data);
-
- wmb(); /* make sure register committed */
-}
-
-static void pll_db_commit_common(struct dsi_pll_14nm *pll,
- struct dsi_pll_input *pin,
- struct dsi_pll_output *pout)
-{
- void __iomem *base = pll->mmio;
- u8 data;
-
- /* confgiure the non frequency dependent pll registers */
- data = 0;
- pll_write(base + REG_DSI_14nm_PHY_PLL_SYSCLK_EN_RESET, data);
-
- data = pout->pll_txclk_en;
- pll_write(base + REG_DSI_14nm_PHY_PLL_TXCLK_EN, data);
-
- data = pout->pll_resetsm_cntrl;
- pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL, data);
- data = pout->pll_resetsm_cntrl2;
- pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL2, data);
- data = pout->pll_resetsm_cntrl5;
- pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL5, data);
-
- data = pout->pll_vco_div_ref & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF1, data);
- data = (pout->pll_vco_div_ref >> 8) & 0x3;
- pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF2, data);
-
- data = pout->pll_kvco_div_ref & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF1, data);
- data = (pout->pll_kvco_div_ref >> 8) & 0x3;
- pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF2, data);
-
- data = pout->pll_misc1;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_MISC1, data);
-
- data = pin->pll_ie_trim;
- pll_write(base + REG_DSI_14nm_PHY_PLL_IE_TRIM, data);
-
- data = pin->pll_ip_trim;
- pll_write(base + REG_DSI_14nm_PHY_PLL_IP_TRIM, data);
-
- data = pin->pll_cpmset_cur << 3 | pin->pll_cpcset_cur;
- pll_write(base + REG_DSI_14nm_PHY_PLL_CP_SET_CUR, data);
-
- data = pin->pll_icpcset_p << 3 | pin->pll_icpcset_m;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPCSET, data);
-
- data = pin->pll_icpmset_p << 3 | pin->pll_icpcset_m;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPMSET, data);
-
- data = pin->pll_icpmset << 3 | pin->pll_icpcset;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICP_SET, data);
-
- data = pin->pll_lpf_cap2 << 4 | pin->pll_lpf_cap1;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF1, data);
-
- data = pin->pll_iptat_trim;
- pll_write(base + REG_DSI_14nm_PHY_PLL_IPTAT_TRIM, data);
-
- data = pin->pll_c3ctrl | pin->pll_r3ctrl << 4;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_CRCTRL, data);
-}
-
-static void pll_14nm_software_reset(struct dsi_pll_14nm *pll_14nm)
-{
- void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
-
- /* de assert pll start and apply pll sw reset */
-
- /* stop pll */
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0);
-
- /* pll sw reset */
- pll_write_udelay(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x20, 10);
- wmb(); /* make sure register committed */
-
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0);
- wmb(); /* make sure register committed */
-}
-
-static void pll_db_commit_14nm(struct dsi_pll_14nm *pll,
- struct dsi_pll_input *pin,
- struct dsi_pll_output *pout)
-{
- void __iomem *base = pll->mmio;
- void __iomem *cmn_base = pll->phy_cmn_mmio;
- u8 data;
-
- DBG("DSI%d PLL", pll->id);
-
- data = pout->cmn_ldo_cntrl;
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_LDO_CNTRL, data);
-
- pll_db_commit_common(pll, pin, pout);
-
- pll_14nm_software_reset(pll);
-
- data = pin->dsiclk_sel; /* set dsiclk_sel = 1 */
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG1, data);
-
- data = 0xff; /* data, clk, pll normal operation */
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_0, data);
-
- /* configure the frequency dependent pll registers */
- data = pout->dec_start;
- pll_write(base + REG_DSI_14nm_PHY_PLL_DEC_START, data);
-
- data = pout->div_frac_start & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1, data);
- data = (pout->div_frac_start >> 8) & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2, data);
- data = (pout->div_frac_start >> 16) & 0xf;
- pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3, data);
-
- data = pout->plllock_cmp & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP1, data);
-
- data = (pout->plllock_cmp >> 8) & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP2, data);
-
- data = (pout->plllock_cmp >> 16) & 0x3;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP3, data);
-
- data = pin->plllock_cnt << 1 | pin->plllock_rng << 3;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP_EN, data);
-
- data = pout->pll_vco_count & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT1, data);
- data = (pout->pll_vco_count >> 8) & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT2, data);
-
- data = pout->pll_kvco_count & 0xff;
- pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT1, data);
- data = (pout->pll_kvco_count >> 8) & 0x3;
- pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT2, data);
-
- data = (pout->pll_postdiv - 1) << 4 | pin->pll_lpf_res1;
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF2_POSTDIV, data);
-
- if (pin->ssc_en)
- pll_db_commit_ssc(pll);
-
- wmb(); /* make sure register committed */
-}
-
-/*
- * VCO clock Callbacks
- */
-static int dsi_pll_14nm_vco_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- struct dsi_pll_input *pin = &pll_14nm->in;
- struct dsi_pll_output *pout = &pll_14nm->out;
-
- DBG("DSI PLL%d rate=%lu, parent's=%lu", pll_14nm->id, rate,
- parent_rate);
-
- pll_14nm->vco_current_rate = rate;
- pll_14nm->vco_ref_clk_rate = VCO_REF_CLK_RATE;
-
- dsi_pll_14nm_input_init(pll_14nm);
-
- /*
- * This configures the post divider internal to the VCO. It's
- * fixed to divide by 1 for now.
- *
- * tx_band = pll_postdiv.
- * 0: divided by 1
- * 1: divided by 2
- * 2: divided by 4
- * 3: divided by 8
- */
- pout->pll_postdiv = DSI_PLL_DEFAULT_VCO_POSTDIV;
-
- pll_14nm_dec_frac_calc(pll_14nm);
-
- if (pin->ssc_en)
- pll_14nm_ssc_calc(pll_14nm);
-
- pll_14nm_calc_vco_count(pll_14nm);
-
- /* commit the slave DSI PLL registers if we're master. Note that we
- * don't lock the slave PLL. We just ensure that the PLL/PHY registers
- * of the master and slave are identical
- */
- if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
- struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
-
- pll_db_commit_14nm(pll_14nm_slave, pin, pout);
- }
-
- pll_db_commit_14nm(pll_14nm, pin, pout);
-
- return 0;
-}
-
-static unsigned long dsi_pll_14nm_vco_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- void __iomem *base = pll_14nm->mmio;
- u64 vco_rate, multiplier = BIT(20);
- u32 div_frac_start;
- u32 dec_start;
- u64 ref_clk = parent_rate;
-
- dec_start = pll_read(base + REG_DSI_14nm_PHY_PLL_DEC_START);
- dec_start &= 0x0ff;
-
- DBG("dec_start = %x", dec_start);
-
- div_frac_start = (pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3)
- & 0xf) << 16;
- div_frac_start |= (pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2)
- & 0xff) << 8;
- div_frac_start |= pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1)
- & 0xff;
-
- DBG("div_frac_start = %x", div_frac_start);
-
- vco_rate = ref_clk * dec_start;
-
- vco_rate += ((ref_clk * div_frac_start) / multiplier);
-
- /*
- * Recalculating the rate from dec_start and frac_start doesn't end up
- * the rate we originally set. Convert the freq to KHz, round it up and
- * convert it back to MHz.
- */
- vco_rate = DIV_ROUND_UP_ULL(vco_rate, 1000) * 1000;
-
- DBG("returning vco rate = %lu", (unsigned long)vco_rate);
-
- return (unsigned long)vco_rate;
-}
-
-static const struct clk_ops clk_ops_dsi_pll_14nm_vco = {
- .round_rate = msm_dsi_pll_helper_clk_round_rate,
- .set_rate = dsi_pll_14nm_vco_set_rate,
- .recalc_rate = dsi_pll_14nm_vco_recalc_rate,
- .prepare = msm_dsi_pll_helper_clk_prepare,
- .unprepare = msm_dsi_pll_helper_clk_unprepare,
-};
-
-/*
- * N1 and N2 post-divider clock callbacks
- */
-#define div_mask(width) ((1 << (width)) - 1)
-static unsigned long dsi_pll_14nm_postdiv_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
- struct dsi_pll_14nm *pll_14nm = postdiv->pll;
- void __iomem *base = pll_14nm->phy_cmn_mmio;
- u8 shift = postdiv->shift;
- u8 width = postdiv->width;
- u32 val;
-
- DBG("DSI%d PLL parent rate=%lu", pll_14nm->id, parent_rate);
-
- val = pll_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0) >> shift;
- val &= div_mask(width);
-
- return divider_recalc_rate(hw, parent_rate, val, NULL,
- postdiv->flags, width);
-}
-
-static long dsi_pll_14nm_postdiv_round_rate(struct clk_hw *hw,
- unsigned long rate,
- unsigned long *prate)
-{
- struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
- struct dsi_pll_14nm *pll_14nm = postdiv->pll;
-
- DBG("DSI%d PLL parent rate=%lu", pll_14nm->id, rate);
-
- return divider_round_rate(hw, rate, prate, NULL,
- postdiv->width,
- postdiv->flags);
-}
-
-static int dsi_pll_14nm_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
- struct dsi_pll_14nm *pll_14nm = postdiv->pll;
- void __iomem *base = pll_14nm->phy_cmn_mmio;
- spinlock_t *lock = &pll_14nm->postdiv_lock;
- u8 shift = postdiv->shift;
- u8 width = postdiv->width;
- unsigned int value;
- unsigned long flags = 0;
- u32 val;
-
- DBG("DSI%d PLL parent rate=%lu parent rate %lu", pll_14nm->id, rate,
- parent_rate);
-
- value = divider_get_val(rate, parent_rate, NULL, postdiv->width,
- postdiv->flags);
-
- spin_lock_irqsave(lock, flags);
-
- val = pll_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0);
- val &= ~(div_mask(width) << shift);
-
- val |= value << shift;
- pll_write(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val);
-
- /* If we're master in dual DSI mode, then the slave PLL's post-dividers
- * follow the master's post dividers
- */
- if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
- struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
- void __iomem *slave_base = pll_14nm_slave->phy_cmn_mmio;
-
- pll_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val);
- }
-
- spin_unlock_irqrestore(lock, flags);
-
- return 0;
-}
-
-static const struct clk_ops clk_ops_dsi_pll_14nm_postdiv = {
- .recalc_rate = dsi_pll_14nm_postdiv_recalc_rate,
- .round_rate = dsi_pll_14nm_postdiv_round_rate,
- .set_rate = dsi_pll_14nm_postdiv_set_rate,
-};
-
-/*
- * PLL Callbacks
- */
-
-static int dsi_pll_14nm_enable_seq(struct msm_dsi_pll *pll)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- void __iomem *base = pll_14nm->mmio;
- void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
- bool locked;
-
- DBG("");
-
- pll_write(base + REG_DSI_14nm_PHY_PLL_VREF_CFG1, 0x10);
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 1);
-
- locked = pll_14nm_poll_for_ready(pll_14nm, POLL_MAX_READS,
- POLL_TIMEOUT_US);
-
- if (unlikely(!locked))
- DRM_DEV_ERROR(&pll_14nm->pdev->dev, "DSI PLL lock failed\n");
- else
- DBG("DSI PLL lock success");
-
- return locked ? 0 : -EINVAL;
-}
-
-static void dsi_pll_14nm_disable_seq(struct msm_dsi_pll *pll)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
-
- DBG("");
-
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0);
-}
-
-static void dsi_pll_14nm_save_state(struct msm_dsi_pll *pll)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state;
- void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
- u32 data;
-
- data = pll_read(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0);
-
- cached_state->n1postdiv = data & 0xf;
- cached_state->n2postdiv = (data >> 4) & 0xf;
-
- DBG("DSI%d PLL save state %x %x", pll_14nm->id,
- cached_state->n1postdiv, cached_state->n2postdiv);
-
- cached_state->vco_rate = clk_hw_get_rate(&pll->clk_hw);
-}
-
-static int dsi_pll_14nm_restore_state(struct msm_dsi_pll *pll)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state;
- void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
- u32 data;
- int ret;
-
- ret = dsi_pll_14nm_vco_set_rate(&pll->clk_hw,
- cached_state->vco_rate, 0);
- if (ret) {
- DRM_DEV_ERROR(&pll_14nm->pdev->dev,
- "restore vco rate failed. ret=%d\n", ret);
- return ret;
- }
-
- data = cached_state->n1postdiv | (cached_state->n2postdiv << 4);
-
- DBG("DSI%d PLL restore state %x %x", pll_14nm->id,
- cached_state->n1postdiv, cached_state->n2postdiv);
-
- pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data);
-
- /* also restore post-dividers for slave DSI PLL */
- if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
- struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
- void __iomem *slave_base = pll_14nm_slave->phy_cmn_mmio;
-
- pll_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data);
- }
-
- return 0;
-}
-
-static int dsi_pll_14nm_set_usecase(struct msm_dsi_pll *pll,
- enum msm_dsi_phy_usecase uc)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- void __iomem *base = pll_14nm->mmio;
- u32 clkbuflr_en, bandgap = 0;
-
- switch (uc) {
- case MSM_DSI_PHY_STANDALONE:
- clkbuflr_en = 0x1;
- break;
- case MSM_DSI_PHY_MASTER:
- clkbuflr_en = 0x3;
- pll_14nm->slave = pll_14nm_list[(pll_14nm->id + 1) % DSI_MAX];
- break;
- case MSM_DSI_PHY_SLAVE:
- clkbuflr_en = 0x0;
- bandgap = 0x3;
- break;
- default:
- return -EINVAL;
- }
-
- pll_write(base + REG_DSI_14nm_PHY_PLL_CLKBUFLR_EN, clkbuflr_en);
- if (bandgap)
- pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_BANDGAP, bandgap);
-
- pll_14nm->uc = uc;
-
- return 0;
-}
-
-static int dsi_pll_14nm_get_provider(struct msm_dsi_pll *pll,
- struct clk **byte_clk_provider,
- struct clk **pixel_clk_provider)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- struct clk_hw_onecell_data *hw_data = pll_14nm->hw_data;
-
- if (byte_clk_provider)
- *byte_clk_provider = hw_data->hws[DSI_BYTE_PLL_CLK]->clk;
- if (pixel_clk_provider)
- *pixel_clk_provider = hw_data->hws[DSI_PIXEL_PLL_CLK]->clk;
-
- return 0;
-}
-
-static void dsi_pll_14nm_destroy(struct msm_dsi_pll *pll)
-{
- struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
- struct platform_device *pdev = pll_14nm->pdev;
- int num_hws = pll_14nm->num_hws;
-
- of_clk_del_provider(pdev->dev.of_node);
-
- while (num_hws--)
- clk_hw_unregister(pll_14nm->hws[num_hws]);
-}
-
-static struct clk_hw *pll_14nm_postdiv_register(struct dsi_pll_14nm *pll_14nm,
- const char *name,
- const char *parent_name,
- unsigned long flags,
- u8 shift)
-{
- struct dsi_pll_14nm_postdiv *pll_postdiv;
- struct device *dev = &pll_14nm->pdev->dev;
- struct clk_init_data postdiv_init = {
- .parent_names = (const char *[]) { parent_name },
- .num_parents = 1,
- .name = name,
- .flags = flags,
- .ops = &clk_ops_dsi_pll_14nm_postdiv,
- };
- int ret;
-
- pll_postdiv = devm_kzalloc(dev, sizeof(*pll_postdiv), GFP_KERNEL);
- if (!pll_postdiv)
- return ERR_PTR(-ENOMEM);
-
- pll_postdiv->pll = pll_14nm;
- pll_postdiv->shift = shift;
- /* both N1 and N2 postdividers are 4 bits wide */
- pll_postdiv->width = 4;
- /* range of each divider is from 1 to 15 */
- pll_postdiv->flags = CLK_DIVIDER_ONE_BASED;
- pll_postdiv->hw.init = &postdiv_init;
-
- ret = clk_hw_register(dev, &pll_postdiv->hw);
- if (ret)
- return ERR_PTR(ret);
-
- return &pll_postdiv->hw;
-}
-
-static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm)
-{
- char clk_name[32], parent[32], vco_name[32];
- struct clk_init_data vco_init = {
- .parent_names = (const char *[]){ "xo" },
- .num_parents = 1,
- .name = vco_name,
- .flags = CLK_IGNORE_UNUSED,
- .ops = &clk_ops_dsi_pll_14nm_vco,
- };
- struct device *dev = &pll_14nm->pdev->dev;
- struct clk_hw **hws = pll_14nm->hws;
- struct clk_hw_onecell_data *hw_data;
- struct clk_hw *hw;
- int num = 0;
- int ret;
-
- DBG("DSI%d", pll_14nm->id);
-
- hw_data = devm_kzalloc(dev, sizeof(*hw_data) +
- NUM_PROVIDED_CLKS * sizeof(struct clk_hw *),
- GFP_KERNEL);
- if (!hw_data)
- return -ENOMEM;
-
- snprintf(vco_name, 32, "dsi%dvco_clk", pll_14nm->id);
- pll_14nm->base.clk_hw.init = &vco_init;
-
- ret = clk_hw_register(dev, &pll_14nm->base.clk_hw);
- if (ret)
- return ret;
-
- hws[num++] = &pll_14nm->base.clk_hw;
-
- snprintf(clk_name, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
- snprintf(parent, 32, "dsi%dvco_clk", pll_14nm->id);
-
- /* N1 postdiv, bits 0-3 in REG_DSI_14nm_PHY_CMN_CLK_CFG0 */
- hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent,
- CLK_SET_RATE_PARENT, 0);
- if (IS_ERR(hw))
- return PTR_ERR(hw);
-
- hws[num++] = hw;
-
- snprintf(clk_name, 32, "dsi%dpllbyte", pll_14nm->id);
- snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
-
- /* DSI Byte clock = VCO_CLK / N1 / 8 */
- hw = clk_hw_register_fixed_factor(dev, clk_name, parent,
- CLK_SET_RATE_PARENT, 1, 8);
- if (IS_ERR(hw))
- return PTR_ERR(hw);
-
- hws[num++] = hw;
- hw_data->hws[DSI_BYTE_PLL_CLK] = hw;
-
- snprintf(clk_name, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
- snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
-
- /*
- * Skip the mux for now, force DSICLK_SEL to 1, Add a /2 divider
- * on the way. Don't let it set parent.
- */
- hw = clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 2);
- if (IS_ERR(hw))
- return PTR_ERR(hw);
-
- hws[num++] = hw;
-
- snprintf(clk_name, 32, "dsi%dpll", pll_14nm->id);
- snprintf(parent, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
-
- /* DSI pixel clock = VCO_CLK / N1 / 2 / N2
- * This is the output of N2 post-divider, bits 4-7 in
- * REG_DSI_14nm_PHY_CMN_CLK_CFG0. Don't let it set parent.
- */
- hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent, 0, 4);
- if (IS_ERR(hw))
- return PTR_ERR(hw);
-
- hws[num++] = hw;
- hw_data->hws[DSI_PIXEL_PLL_CLK] = hw;
-
- pll_14nm->num_hws = num;
-
- hw_data->num = NUM_PROVIDED_CLKS;
- pll_14nm->hw_data = hw_data;
-
- ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
- pll_14nm->hw_data);
- if (ret) {
- DRM_DEV_ERROR(dev, "failed to register clk provider: %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-struct msm_dsi_pll *msm_dsi_pll_14nm_init(struct platform_device *pdev, int id)
-{
- struct dsi_pll_14nm *pll_14nm;
- struct msm_dsi_pll *pll;
- int ret;
-
- if (!pdev)
- return ERR_PTR(-ENODEV);
-
- pll_14nm = devm_kzalloc(&pdev->dev, sizeof(*pll_14nm), GFP_KERNEL);
- if (!pll_14nm)
- return ERR_PTR(-ENOMEM);
-
- DBG("PLL%d", id);
-
- pll_14nm->pdev = pdev;
- pll_14nm->id = id;
- pll_14nm_list[id] = pll_14nm;
-
- pll_14nm->phy_cmn_mmio = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
- if (IS_ERR_OR_NULL(pll_14nm->phy_cmn_mmio)) {
- DRM_DEV_ERROR(&pdev->dev, "failed to map CMN PHY base\n");
- return ERR_PTR(-ENOMEM);
- }
-
- pll_14nm->mmio = msm_ioremap(pdev, "dsi_pll", "DSI_PLL");
- if (IS_ERR_OR_NULL(pll_14nm->mmio)) {
- DRM_DEV_ERROR(&pdev->dev, "failed to map PLL base\n");
- return ERR_PTR(-ENOMEM);
- }
-
- spin_lock_init(&pll_14nm->postdiv_lock);
-
- pll = &pll_14nm->base;
- pll->min_rate = VCO_MIN_RATE;
- pll->max_rate = VCO_MAX_RATE;
- pll->get_provider = dsi_pll_14nm_get_provider;
- pll->destroy = dsi_pll_14nm_destroy;
- pll->disable_seq = dsi_pll_14nm_disable_seq;
- pll->save_state = dsi_pll_14nm_save_state;
- pll->restore_state = dsi_pll_14nm_restore_state;
- pll->set_usecase = dsi_pll_14nm_set_usecase;
-
- pll_14nm->vco_delay = 1;
-
- pll->en_seq_cnt = 1;
- pll->enable_seqs[0] = dsi_pll_14nm_enable_seq;
-
- ret = pll_14nm_register(pll_14nm);
- if (ret) {
- DRM_DEV_ERROR(&pdev->dev, "failed to register PLL: %d\n", ret);
- return ERR_PTR(ret);
- }
-
- return pll;
-}
generated by cgit (git 2.34.1) at 2024-07-03 03:07:47 +0000