kernel/drivers/clk/mmp/clk-of-pxa910.c

   1 /*
   2  * pxa910 clock framework source file
   3  *
   4  * Copyright (C) 2012 Marvell
   5  * Chao Xie <xiechao.mail@gmail.com>
   6  *
   7  * This file is licensed under the terms of the GNU General Public
   8  * License version 2. This program is licensed "as is" without any
   9  * warranty of any kind, whether express or implied.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/spinlock.h>
  15 #include <linux/io.h>
  16 #include <linux/delay.h>
  17 #include <linux/err.h>
  18 #include <linux/of_address.h>
  19
  20 #include <dt-bindings/clock/marvell,pxa910.h>
  21
  22 #include "clk.h"
  23 #include "reset.h"
  24
  25 #define APBC_RTC        0x28
  26 #define APBC_TWSI0      0x2c
  27 #define APBC_KPC        0x18
  28 #define APBC_UART0      0x0
  29 #define APBC_UART1      0x4
  30 #define APBC_GPIO       0x8
  31 #define APBC_PWM0       0xc
  32 #define APBC_PWM1       0x10
  33 #define APBC_PWM2       0x14
  34 #define APBC_PWM3       0x18
  35 #define APBC_SSP0       0x1c
  36 #define APBC_SSP1       0x20
  37 #define APBC_SSP2       0x4c
  38 #define APBCP_TWSI1     0x28
  39 #define APBCP_UART2     0x1c
  40 #define APMU_SDH0       0x54
  41 #define APMU_SDH1       0x58
  42 #define APMU_USB        0x5c
  43 #define APMU_DISP0      0x4c
  44 #define APMU_CCIC0      0x50
  45 #define APMU_DFC        0x60
  46 #define MPMU_UART_PLL   0x14
  47
  48 struct pxa910_clk_unit {
  49         struct mmp_clk_unit unit;
  50         void __iomem *mpmu_base;
  51         void __iomem *apmu_base;
  52         void __iomem *apbc_base;
  53         void __iomem *apbcp_base;
  54 };
  55
  56 static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
  57         {PXA910_CLK_CLK32, "clk32", NULL, CLK_IS_ROOT, 32768},
  58         {PXA910_CLK_VCTCXO, "vctcxo", NULL, CLK_IS_ROOT, 26000000},
  59         {PXA910_CLK_PLL1, "pll1", NULL, CLK_IS_ROOT, 624000000},
  60 };
  61
  62 static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
  63         {PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},
  64         {PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},
  65         {PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},
  66         {PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},
  67         {PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0},
  68         {PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},
  69         {PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0},
  70         {PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0},
  71         {PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0},
  72         {PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0},
  73         {PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0},
  74         {PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0},
  75         {PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0},
  76 };
  77
  78 static struct mmp_clk_factor_masks uart_factor_masks = {
  79         .factor = 2,
  80         .num_mask = 0x1fff,
  81         .den_mask = 0x1fff,
  82         .num_shift = 16,
  83         .den_shift = 0,
  84 };
  85
  86 static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
  87         {.num = 8125, .den = 1536},     /*14.745MHZ */
  88 };
  89
  90 static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit)
  91 {
  92         struct clk *clk;
  93         struct mmp_clk_unit *unit = &pxa_unit->unit;
  94
  95         mmp_register_fixed_rate_clks(unit, fixed_rate_clks,
  96                                         ARRAY_SIZE(fixed_rate_clks));
  97
  98         mmp_register_fixed_factor_clks(unit, fixed_factor_clks,
  99                                         ARRAY_SIZE(fixed_factor_clks));
 100
 101         clk = mmp_clk_register_factor("uart_pll", "pll1_4",
 102                                 CLK_SET_RATE_PARENT,
 103                                 pxa_unit->mpmu_base + MPMU_UART_PLL,
 104                                 &uart_factor_masks, uart_factor_tbl,
 105                                 ARRAY_SIZE(uart_factor_tbl), NULL);
 106         mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk);
 107 }
 108
 109 static DEFINE_SPINLOCK(uart0_lock);
 110 static DEFINE_SPINLOCK(uart1_lock);
 111 static DEFINE_SPINLOCK(uart2_lock);
 112 static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"};
 113
 114 static DEFINE_SPINLOCK(ssp0_lock);
 115 static DEFINE_SPINLOCK(ssp1_lock);
 116 static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
 117
 118 static DEFINE_SPINLOCK(reset_lock);
 119
 120 static struct mmp_param_mux_clk apbc_mux_clks[] = {
 121         {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},
 122         {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},
 123         {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},
 124         {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},
 125 };
 126
 127 static struct mmp_param_mux_clk apbcp_mux_clks[] = {
 128         {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock},
 129 };
 130
 131 static struct mmp_param_gate_clk apbc_gate_clks[] = {
 132         {PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock},
 133         {PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock},
 134         {PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
 135         {PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
 136         {PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock},
 137         {PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock},
 138         {PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock},
 139         {PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock},
 140         /* The gate clocks has mux parent. */
 141         {PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock},
 142         {PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock},
 143         {PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock},
 144         {PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock},
 145 };
 146
 147 static struct mmp_param_gate_clk apbcp_gate_clks[] = {
 148         {PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock},
 149         /* The gate clocks has mux parent. */
 150         {PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock},
 151 };
 152
 153 static void pxa910_apb_periph_clk_init(struct pxa910_clk_unit *pxa_unit)
 154 {
 155         struct mmp_clk_unit *unit = &pxa_unit->unit;
 156
 157         mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,
 158                                 ARRAY_SIZE(apbc_mux_clks));
 159
 160         mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base,
 161                                 ARRAY_SIZE(apbcp_mux_clks));
 162
 163         mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,
 164                                 ARRAY_SIZE(apbc_gate_clks));
 165
 166         mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base,
 167                                 ARRAY_SIZE(apbcp_gate_clks));
 168 }
 169
 170 static DEFINE_SPINLOCK(sdh0_lock);
 171 static DEFINE_SPINLOCK(sdh1_lock);
 172 static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"};
 173
 174 static DEFINE_SPINLOCK(usb_lock);
 175
 176 static DEFINE_SPINLOCK(disp0_lock);
 177 static const char *disp_parent_names[] = {"pll1_2", "pll1_12"};
 178
 179 static DEFINE_SPINLOCK(ccic0_lock);
 180 static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"};
 181 static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"};
 182
 183 static struct mmp_param_mux_clk apmu_mux_clks[] = {
 184         {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock},
 185         {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock},
 186         {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock},
 187         {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock},
 188         {0, "ccic0_phy_mux", ccic_phy_parent_names, ARRAY_SIZE(ccic_phy_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 7, 1, 0, &ccic0_lock},
 189 };
 190
 191 static struct mmp_param_div_clk apmu_div_clks[] = {
 192         {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},
 193 };
 194
 195 static struct mmp_param_gate_clk apmu_gate_clks[] = {
 196         {PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL},
 197         {PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},
 198         {PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock},
 199         /* The gate clocks has mux parent. */
 200         {PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},
 201         {PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},
 202         {PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},
 203         {PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},
 204         {PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},
 205         {PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},
 206 };
 207
 208 static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit)
 209 {
 210         struct mmp_clk_unit *unit = &pxa_unit->unit;
 211
 212         mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,
 213                                 ARRAY_SIZE(apmu_mux_clks));
 214
 215         mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,
 216                                 ARRAY_SIZE(apmu_div_clks));
 217
 218         mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,
 219                                 ARRAY_SIZE(apmu_gate_clks));
 220 }
 221
 222 static void pxa910_clk_reset_init(struct device_node *np,
 223                                 struct pxa910_clk_unit *pxa_unit)
 224 {
 225         struct mmp_clk_reset_cell *cells;
 226         int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets;
 227
 228         nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks);
 229         nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks);
 230         nr_resets = nr_resets_apbc + nr_resets_apbcp;
 231         cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
 232         if (!cells)
 233                 return;
 234
 235         base = 0;
 236         for (i = 0; i < nr_resets_apbc; i++) {
 237                 cells[base + i].clk_id = apbc_gate_clks[i].id;
 238                 cells[base + i].reg =
 239                         pxa_unit->apbc_base + apbc_gate_clks[i].offset;
 240                 cells[base + i].flags = 0;
 241                 cells[base + i].lock = apbc_gate_clks[i].lock;
 242                 cells[base + i].bits = 0x4;
 243         }
 244
 245         base = nr_resets_apbc;
 246         for (i = 0; i < nr_resets_apbcp; i++) {
 247                 cells[base + i].clk_id = apbcp_gate_clks[i].id;
 248                 cells[base + i].reg =
 249                         pxa_unit->apbc_base + apbc_gate_clks[i].offset;
 250                 cells[base + i].flags = 0;
 251                 cells[base + i].lock = apbc_gate_clks[i].lock;
 252                 cells[base + i].bits = 0x4;
 253         }
 254
 255         mmp_clk_reset_register(np, cells, nr_resets);
 256 }
 257
 258 static void __init pxa910_clk_init(struct device_node *np)
 259 {
 260         struct pxa910_clk_unit *pxa_unit;
 261
 262         pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
 263         if (!pxa_unit)
 264                 return;
 265
 266         pxa_unit->mpmu_base = of_iomap(np, 0);
 267         if (!pxa_unit->mpmu_base) {
 268                 pr_err("failed to map mpmu registers\n");
 269                 return;
 270         }
 271
 272         pxa_unit->apmu_base = of_iomap(np, 1);
 273         if (!pxa_unit->mpmu_base) {
 274                 pr_err("failed to map apmu registers\n");
 275                 return;
 276         }
 277
 278         pxa_unit->apbc_base = of_iomap(np, 2);
 279         if (!pxa_unit->apbc_base) {
 280                 pr_err("failed to map apbc registers\n");
 281                 return;
 282         }
 283
 284         pxa_unit->apbcp_base = of_iomap(np, 3);
 285         if (!pxa_unit->mpmu_base) {
 286                 pr_err("failed to map apbcp registers\n");
 287                 return;
 288         }
 289
 290         mmp_clk_init(np, &pxa_unit->unit, PXA910_NR_CLKS);
 291
 292         pxa910_pll_init(pxa_unit);
 293
 294         pxa910_apb_periph_clk_init(pxa_unit);
 295
 296         pxa910_axi_periph_clk_init(pxa_unit);
 297
 298         pxa910_clk_reset_init(np, pxa_unit);
 299 }
 300
 301 CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init);