kernel/drivers/clk/mmp/clk-of-pxa168.c

   1 /*
   2  * pxa168 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,pxa168.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        0x30
  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       0x81c
  36 #define APBC_SSP1       0x820
  37 #define APBC_SSP2       0x84c
  38 #define APBC_SSP3       0x858
  39 #define APBC_SSP4       0x85c
  40 #define APBC_TWSI1      0x6c
  41 #define APBC_UART2      0x70
  42 #define APMU_SDH0       0x54
  43 #define APMU_SDH1       0x58
  44 #define APMU_USB        0x5c
  45 #define APMU_DISP0      0x4c
  46 #define APMU_CCIC0      0x50
  47 #define APMU_DFC        0x60
  48 #define MPMU_UART_PLL   0x14
  49
  50 struct pxa168_clk_unit {
  51         struct mmp_clk_unit unit;
  52         void __iomem *mpmu_base;
  53         void __iomem *apmu_base;
  54         void __iomem *apbc_base;
  55 };
  56
  57 static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {
  58         {PXA168_CLK_CLK32, "clk32", NULL, CLK_IS_ROOT, 32768},
  59         {PXA168_CLK_VCTCXO, "vctcxo", NULL, CLK_IS_ROOT, 26000000},
  60         {PXA168_CLK_PLL1, "pll1", NULL, CLK_IS_ROOT, 624000000},
  61 };
  62
  63 static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {
  64         {PXA168_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},
  65         {PXA168_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},
  66         {PXA168_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},
  67         {PXA168_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},
  68         {PXA168_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0},
  69         {PXA168_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},
  70         {PXA168_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0},
  71         {PXA168_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0},
  72         {PXA168_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0},
  73         {PXA168_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0},
  74         {PXA168_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0},
  75         {PXA168_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0},
  76         {PXA168_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0},
  77 };
  78
  79 static struct mmp_clk_factor_masks uart_factor_masks = {
  80         .factor = 2,
  81         .num_mask = 0x1fff,
  82         .den_mask = 0x1fff,
  83         .num_shift = 16,
  84         .den_shift = 0,
  85 };
  86
  87 static struct mmp_clk_factor_tbl uart_factor_tbl[] = {
  88         {.num = 8125, .den = 1536},     /*14.745MHZ */
  89 };
  90
  91 static void pxa168_pll_init(struct pxa168_clk_unit *pxa_unit)
  92 {
  93         struct clk *clk;
  94         struct mmp_clk_unit *unit = &pxa_unit->unit;
  95
  96         mmp_register_fixed_rate_clks(unit, fixed_rate_clks,
  97                                         ARRAY_SIZE(fixed_rate_clks));
  98
  99         mmp_register_fixed_factor_clks(unit, fixed_factor_clks,
 100                                         ARRAY_SIZE(fixed_factor_clks));
 101
 102         clk = mmp_clk_register_factor("uart_pll", "pll1_4",
 103                                 CLK_SET_RATE_PARENT,
 104                                 pxa_unit->mpmu_base + MPMU_UART_PLL,
 105                                 &uart_factor_masks, uart_factor_tbl,
 106                                 ARRAY_SIZE(uart_factor_tbl), NULL);
 107         mmp_clk_add(unit, PXA168_CLK_UART_PLL, clk);
 108 }
 109
 110 static DEFINE_SPINLOCK(uart0_lock);
 111 static DEFINE_SPINLOCK(uart1_lock);
 112 static DEFINE_SPINLOCK(uart2_lock);
 113 static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"};
 114
 115 static DEFINE_SPINLOCK(ssp0_lock);
 116 static DEFINE_SPINLOCK(ssp1_lock);
 117 static DEFINE_SPINLOCK(ssp2_lock);
 118 static DEFINE_SPINLOCK(ssp3_lock);
 119 static DEFINE_SPINLOCK(ssp4_lock);
 120 static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};
 121
 122 static DEFINE_SPINLOCK(reset_lock);
 123
 124 static struct mmp_param_mux_clk apbc_mux_clks[] = {
 125         {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},
 126         {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},
 127         {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART2, 4, 3, 0, &uart2_lock},
 128         {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},
 129         {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},
 130         {0, "ssp2_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP2, 4, 3, 0, &ssp2_lock},
 131         {0, "ssp3_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP3, 4, 3, 0, &ssp3_lock},
 132         {0, "ssp4_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP4, 4, 3, 0, &ssp4_lock},
 133 };
 134
 135 static struct mmp_param_gate_clk apbc_gate_clks[] = {
 136         {PXA168_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock},
 137         {PXA168_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock},
 138         {PXA168_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock},
 139         {PXA168_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
 140         {PXA168_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},
 141         {PXA168_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock},
 142         {PXA168_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock},
 143         {PXA168_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock},
 144         {PXA168_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock},
 145         /* The gate clocks has mux parent. */
 146         {PXA168_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock},
 147         {PXA168_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock},
 148         {PXA168_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBC_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock},
 149         {PXA168_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock},
 150         {PXA168_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock},
 151         {PXA168_CLK_SSP2, "ssp2_clk", "ssp2_mux", CLK_SET_RATE_PARENT, APBC_SSP2, 0x3, 0x3, 0x0, 0, &ssp2_lock},
 152         {PXA168_CLK_SSP3, "ssp3_clk", "ssp3_mux", CLK_SET_RATE_PARENT, APBC_SSP3, 0x3, 0x3, 0x0, 0, &ssp3_lock},
 153         {PXA168_CLK_SSP4, "ssp4_clk", "ssp4_mux", CLK_SET_RATE_PARENT, APBC_SSP4, 0x3, 0x3, 0x0, 0, &ssp4_lock},
 154 };
 155
 156 static void pxa168_apb_periph_clk_init(struct pxa168_clk_unit *pxa_unit)
 157 {
 158         struct mmp_clk_unit *unit = &pxa_unit->unit;
 159
 160         mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base,
 161                                 ARRAY_SIZE(apbc_mux_clks));
 162
 163         mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,
 164                                 ARRAY_SIZE(apbc_gate_clks));
 165
 166 }
 167
 168 static DEFINE_SPINLOCK(sdh0_lock);
 169 static DEFINE_SPINLOCK(sdh1_lock);
 170 static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"};
 171
 172 static DEFINE_SPINLOCK(usb_lock);
 173
 174 static DEFINE_SPINLOCK(disp0_lock);
 175 static const char *disp_parent_names[] = {"pll1_2", "pll1_12"};
 176
 177 static DEFINE_SPINLOCK(ccic0_lock);
 178 static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"};
 179 static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"};
 180
 181 static struct mmp_param_mux_clk apmu_mux_clks[] = {
 182         {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock},
 183         {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock},
 184         {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock},
 185         {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock},
 186         {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},
 187 };
 188
 189 static struct mmp_param_div_clk apmu_div_clks[] = {
 190         {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},
 191 };
 192
 193 static struct mmp_param_gate_clk apmu_gate_clks[] = {
 194         {PXA168_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL},
 195         {PXA168_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},
 196         {PXA168_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock},
 197         /* The gate clocks has mux parent. */
 198         {PXA168_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},
 199         {PXA168_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},
 200         {PXA168_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},
 201         {PXA168_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},
 202         {PXA168_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},
 203         {PXA168_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},
 204 };
 205
 206 static void pxa168_axi_periph_clk_init(struct pxa168_clk_unit *pxa_unit)
 207 {
 208         struct mmp_clk_unit *unit = &pxa_unit->unit;
 209
 210         mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,
 211                                 ARRAY_SIZE(apmu_mux_clks));
 212
 213         mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,
 214                                 ARRAY_SIZE(apmu_div_clks));
 215
 216         mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,
 217                                 ARRAY_SIZE(apmu_gate_clks));
 218 }
 219
 220 static void pxa168_clk_reset_init(struct device_node *np,
 221                                 struct pxa168_clk_unit *pxa_unit)
 222 {
 223         struct mmp_clk_reset_cell *cells;
 224         int i, nr_resets;
 225
 226         nr_resets = ARRAY_SIZE(apbc_gate_clks);
 227         cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);
 228         if (!cells)
 229                 return;
 230
 231         for (i = 0; i < nr_resets; i++) {
 232                 cells[i].clk_id = apbc_gate_clks[i].id;
 233                 cells[i].reg = pxa_unit->apbc_base + apbc_gate_clks[i].offset;
 234                 cells[i].flags = 0;
 235                 cells[i].lock = apbc_gate_clks[i].lock;
 236                 cells[i].bits = 0x4;
 237         }
 238
 239         mmp_clk_reset_register(np, cells, nr_resets);
 240 }
 241
 242 static void __init pxa168_clk_init(struct device_node *np)
 243 {
 244         struct pxa168_clk_unit *pxa_unit;
 245
 246         pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);
 247         if (!pxa_unit)
 248                 return;
 249
 250         pxa_unit->mpmu_base = of_iomap(np, 0);
 251         if (!pxa_unit->mpmu_base) {
 252                 pr_err("failed to map mpmu registers\n");
 253                 return;
 254         }
 255
 256         pxa_unit->apmu_base = of_iomap(np, 1);
 257         if (!pxa_unit->mpmu_base) {
 258                 pr_err("failed to map apmu registers\n");
 259                 return;
 260         }
 261
 262         pxa_unit->apbc_base = of_iomap(np, 2);
 263         if (!pxa_unit->apbc_base) {
 264                 pr_err("failed to map apbc registers\n");
 265                 return;
 266         }
 267
 268         mmp_clk_init(np, &pxa_unit->unit, PXA168_NR_CLKS);
 269
 270         pxa168_pll_init(pxa_unit);
 271
 272         pxa168_apb_periph_clk_init(pxa_unit);
 273
 274         pxa168_axi_periph_clk_init(pxa_unit);
 275
 276         pxa168_clk_reset_init(np, pxa_unit);
 277 }
 278
 279 CLK_OF_DECLARE(pxa168_clk, "marvell,pxa168-clock", pxa168_clk_init);