Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 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 |
Chao Xie | 24c65a0 | 2015-04-30 09:53:42 +0800 | [diff] [blame] | 35 | #define APBC_TIMER 0x34 |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 36 | #define APBC_SSP0 0x81c |
| 37 | #define APBC_SSP1 0x820 |
| 38 | #define APBC_SSP2 0x84c |
| 39 | #define APBC_SSP3 0x858 |
| 40 | #define APBC_SSP4 0x85c |
| 41 | #define APBC_TWSI1 0x6c |
| 42 | #define APBC_UART2 0x70 |
| 43 | #define APMU_SDH0 0x54 |
| 44 | #define APMU_SDH1 0x58 |
| 45 | #define APMU_USB 0x5c |
| 46 | #define APMU_DISP0 0x4c |
| 47 | #define APMU_CCIC0 0x50 |
| 48 | #define APMU_DFC 0x60 |
| 49 | #define MPMU_UART_PLL 0x14 |
| 50 | |
| 51 | struct pxa168_clk_unit { |
| 52 | struct mmp_clk_unit unit; |
| 53 | void __iomem *mpmu_base; |
| 54 | void __iomem *apmu_base; |
| 55 | void __iomem *apbc_base; |
| 56 | }; |
| 57 | |
| 58 | static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = { |
Stephen Boyd | 536630d | 2016-03-01 10:59:52 -0800 | [diff] [blame] | 59 | {PXA168_CLK_CLK32, "clk32", NULL, 0, 32768}, |
| 60 | {PXA168_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000}, |
| 61 | {PXA168_CLK_PLL1, "pll1", NULL, 0, 624000000}, |
| 62 | {PXA168_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000}, |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = { |
| 66 | {PXA168_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0}, |
| 67 | {PXA168_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0}, |
| 68 | {PXA168_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0}, |
| 69 | {PXA168_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0}, |
| 70 | {PXA168_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0}, |
| 71 | {PXA168_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0}, |
| 72 | {PXA168_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0}, |
| 73 | {PXA168_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0}, |
| 74 | {PXA168_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0}, |
Chao Xie | 24c65a0 | 2015-04-30 09:53:42 +0800 | [diff] [blame] | 75 | {PXA168_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0}, |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 76 | {PXA168_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0}, |
| 77 | {PXA168_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0}, |
| 78 | {PXA168_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0}, |
| 79 | {PXA168_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0}, |
| 80 | }; |
| 81 | |
| 82 | static struct mmp_clk_factor_masks uart_factor_masks = { |
| 83 | .factor = 2, |
| 84 | .num_mask = 0x1fff, |
| 85 | .den_mask = 0x1fff, |
| 86 | .num_shift = 16, |
| 87 | .den_shift = 0, |
| 88 | }; |
| 89 | |
| 90 | static struct mmp_clk_factor_tbl uart_factor_tbl[] = { |
| 91 | {.num = 8125, .den = 1536}, /*14.745MHZ */ |
| 92 | }; |
| 93 | |
| 94 | static void pxa168_pll_init(struct pxa168_clk_unit *pxa_unit) |
| 95 | { |
| 96 | struct clk *clk; |
| 97 | struct mmp_clk_unit *unit = &pxa_unit->unit; |
| 98 | |
| 99 | mmp_register_fixed_rate_clks(unit, fixed_rate_clks, |
| 100 | ARRAY_SIZE(fixed_rate_clks)); |
| 101 | |
| 102 | mmp_register_fixed_factor_clks(unit, fixed_factor_clks, |
| 103 | ARRAY_SIZE(fixed_factor_clks)); |
| 104 | |
| 105 | clk = mmp_clk_register_factor("uart_pll", "pll1_4", |
| 106 | CLK_SET_RATE_PARENT, |
| 107 | pxa_unit->mpmu_base + MPMU_UART_PLL, |
| 108 | &uart_factor_masks, uart_factor_tbl, |
| 109 | ARRAY_SIZE(uart_factor_tbl), NULL); |
| 110 | mmp_clk_add(unit, PXA168_CLK_UART_PLL, clk); |
| 111 | } |
| 112 | |
| 113 | static DEFINE_SPINLOCK(uart0_lock); |
| 114 | static DEFINE_SPINLOCK(uart1_lock); |
| 115 | static DEFINE_SPINLOCK(uart2_lock); |
| 116 | static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"}; |
| 117 | |
| 118 | static DEFINE_SPINLOCK(ssp0_lock); |
| 119 | static DEFINE_SPINLOCK(ssp1_lock); |
| 120 | static DEFINE_SPINLOCK(ssp2_lock); |
| 121 | static DEFINE_SPINLOCK(ssp3_lock); |
| 122 | static DEFINE_SPINLOCK(ssp4_lock); |
| 123 | static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"}; |
| 124 | |
Chao Xie | 24c65a0 | 2015-04-30 09:53:42 +0800 | [diff] [blame] | 125 | static DEFINE_SPINLOCK(timer_lock); |
| 126 | static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96", "pll1_192"}; |
| 127 | |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 128 | static DEFINE_SPINLOCK(reset_lock); |
| 129 | |
| 130 | static struct mmp_param_mux_clk apbc_mux_clks[] = { |
| 131 | {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock}, |
| 132 | {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock}, |
| 133 | {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART2, 4, 3, 0, &uart2_lock}, |
| 134 | {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock}, |
| 135 | {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock}, |
| 136 | {0, "ssp2_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP2, 4, 3, 0, &ssp2_lock}, |
| 137 | {0, "ssp3_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP3, 4, 3, 0, &ssp3_lock}, |
| 138 | {0, "ssp4_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP4, 4, 3, 0, &ssp4_lock}, |
Chao Xie | 24c65a0 | 2015-04-30 09:53:42 +0800 | [diff] [blame] | 139 | {0, "timer_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER, 4, 3, 0, &timer_lock}, |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | static struct mmp_param_gate_clk apbc_gate_clks[] = { |
| 143 | {PXA168_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 144 | {PXA168_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 145 | {PXA168_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 146 | {PXA168_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, |
| 147 | {PXA168_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, |
| 148 | {PXA168_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 149 | {PXA168_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 150 | {PXA168_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 151 | {PXA168_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock}, |
| 152 | /* The gate clocks has mux parent. */ |
| 153 | {PXA168_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock}, |
| 154 | {PXA168_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock}, |
| 155 | {PXA168_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBC_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock}, |
| 156 | {PXA168_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock}, |
| 157 | {PXA168_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock}, |
| 158 | {PXA168_CLK_SSP2, "ssp2_clk", "ssp2_mux", CLK_SET_RATE_PARENT, APBC_SSP2, 0x3, 0x3, 0x0, 0, &ssp2_lock}, |
| 159 | {PXA168_CLK_SSP3, "ssp3_clk", "ssp3_mux", CLK_SET_RATE_PARENT, APBC_SSP3, 0x3, 0x3, 0x0, 0, &ssp3_lock}, |
| 160 | {PXA168_CLK_SSP4, "ssp4_clk", "ssp4_mux", CLK_SET_RATE_PARENT, APBC_SSP4, 0x3, 0x3, 0x0, 0, &ssp4_lock}, |
Chao Xie | 24c65a0 | 2015-04-30 09:53:42 +0800 | [diff] [blame] | 161 | {PXA168_CLK_TIMER, "timer_clk", "timer_mux", CLK_SET_RATE_PARENT, APBC_TIMER, 0x3, 0x3, 0x0, 0, &timer_lock}, |
Chao Xie | ab08aef | 2014-10-31 10:13:49 +0800 | [diff] [blame] | 162 | }; |
| 163 | |
| 164 | static void pxa168_apb_periph_clk_init(struct pxa168_clk_unit *pxa_unit) |
| 165 | { |
| 166 | struct mmp_clk_unit *unit = &pxa_unit->unit; |
| 167 | |
| 168 | mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base, |
| 169 | ARRAY_SIZE(apbc_mux_clks)); |
| 170 | |
| 171 | mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base, |
| 172 | ARRAY_SIZE(apbc_gate_clks)); |
| 173 | |
| 174 | } |
| 175 | |
| 176 | static DEFINE_SPINLOCK(sdh0_lock); |
| 177 | static DEFINE_SPINLOCK(sdh1_lock); |
| 178 | static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"}; |
| 179 | |
| 180 | static DEFINE_SPINLOCK(usb_lock); |
| 181 | |
| 182 | static DEFINE_SPINLOCK(disp0_lock); |
| 183 | static const char *disp_parent_names[] = {"pll1_2", "pll1_12"}; |
| 184 | |
| 185 | static DEFINE_SPINLOCK(ccic0_lock); |
| 186 | static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"}; |
| 187 | static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"}; |
| 188 | |
| 189 | static struct mmp_param_mux_clk apmu_mux_clks[] = { |
| 190 | {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock}, |
| 191 | {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock}, |
| 192 | {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock}, |
| 193 | {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock}, |
| 194 | {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}, |
| 195 | }; |
| 196 | |
| 197 | static struct mmp_param_div_clk apmu_div_clks[] = { |
| 198 | {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock}, |
| 199 | }; |
| 200 | |
| 201 | static struct mmp_param_gate_clk apmu_gate_clks[] = { |
| 202 | {PXA168_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL}, |
| 203 | {PXA168_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock}, |
| 204 | {PXA168_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock}, |
| 205 | /* The gate clocks has mux parent. */ |
| 206 | {PXA168_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock}, |
| 207 | {PXA168_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock}, |
| 208 | {PXA168_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock}, |
| 209 | {PXA168_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock}, |
| 210 | {PXA168_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock}, |
| 211 | {PXA168_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock}, |
| 212 | }; |
| 213 | |
| 214 | static void pxa168_axi_periph_clk_init(struct pxa168_clk_unit *pxa_unit) |
| 215 | { |
| 216 | struct mmp_clk_unit *unit = &pxa_unit->unit; |
| 217 | |
| 218 | mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base, |
| 219 | ARRAY_SIZE(apmu_mux_clks)); |
| 220 | |
| 221 | mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base, |
| 222 | ARRAY_SIZE(apmu_div_clks)); |
| 223 | |
| 224 | mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base, |
| 225 | ARRAY_SIZE(apmu_gate_clks)); |
| 226 | } |
| 227 | |
| 228 | static void pxa168_clk_reset_init(struct device_node *np, |
| 229 | struct pxa168_clk_unit *pxa_unit) |
| 230 | { |
| 231 | struct mmp_clk_reset_cell *cells; |
| 232 | int i, nr_resets; |
| 233 | |
| 234 | nr_resets = ARRAY_SIZE(apbc_gate_clks); |
| 235 | cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL); |
| 236 | if (!cells) |
| 237 | return; |
| 238 | |
| 239 | for (i = 0; i < nr_resets; i++) { |
| 240 | cells[i].clk_id = apbc_gate_clks[i].id; |
| 241 | cells[i].reg = pxa_unit->apbc_base + apbc_gate_clks[i].offset; |
| 242 | cells[i].flags = 0; |
| 243 | cells[i].lock = apbc_gate_clks[i].lock; |
| 244 | cells[i].bits = 0x4; |
| 245 | } |
| 246 | |
| 247 | mmp_clk_reset_register(np, cells, nr_resets); |
| 248 | } |
| 249 | |
| 250 | static void __init pxa168_clk_init(struct device_node *np) |
| 251 | { |
| 252 | struct pxa168_clk_unit *pxa_unit; |
| 253 | |
| 254 | pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL); |
| 255 | if (!pxa_unit) |
| 256 | return; |
| 257 | |
| 258 | pxa_unit->mpmu_base = of_iomap(np, 0); |
| 259 | if (!pxa_unit->mpmu_base) { |
| 260 | pr_err("failed to map mpmu registers\n"); |
| 261 | return; |
| 262 | } |
| 263 | |
| 264 | pxa_unit->apmu_base = of_iomap(np, 1); |
| 265 | if (!pxa_unit->mpmu_base) { |
| 266 | pr_err("failed to map apmu registers\n"); |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | pxa_unit->apbc_base = of_iomap(np, 2); |
| 271 | if (!pxa_unit->apbc_base) { |
| 272 | pr_err("failed to map apbc registers\n"); |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | mmp_clk_init(np, &pxa_unit->unit, PXA168_NR_CLKS); |
| 277 | |
| 278 | pxa168_pll_init(pxa_unit); |
| 279 | |
| 280 | pxa168_apb_periph_clk_init(pxa_unit); |
| 281 | |
| 282 | pxa168_axi_periph_clk_init(pxa_unit); |
| 283 | |
| 284 | pxa168_clk_reset_init(np, pxa_unit); |
| 285 | } |
| 286 | |
| 287 | CLK_OF_DECLARE(pxa168_clk, "marvell,pxa168-clock", pxa168_clk_init); |