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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * pxa910 clock framework source file4 *5 * Copyright (C) 2012 Marvell6 * Chao Xie <xiechao.mail@gmail.com>7 */8 9#include <linux/module.h>10#include <linux/kernel.h>11#include <linux/spinlock.h>12#include <linux/io.h>13#include <linux/delay.h>14#include <linux/err.h>15#include <linux/of_address.h>16 17#include <dt-bindings/clock/marvell,pxa910.h>18 19#include "clk.h"20#include "reset.h"21 22#define APBC_RTC	0x2823#define APBC_TWSI0	0x2c24#define APBC_KPC	0x1825#define APBC_UART0	0x026#define APBC_UART1	0x427#define APBC_GPIO	0x828#define APBC_PWM0	0xc29#define APBC_PWM1	0x1030#define APBC_PWM2	0x1431#define APBC_PWM3	0x1832#define APBC_SSP0	0x1c33#define APBC_SSP1	0x2034#define APBC_SSP2	0x4c35#define APBC_TIMER0	0x3036#define APBC_TIMER1	0x4437#define APBCP_TWSI1	0x2838#define APBCP_UART2	0x1c39#define APMU_SDH0	0x5440#define APMU_SDH1	0x5841#define APMU_USB	0x5c42#define APMU_DISP0	0x4c43#define APMU_CCIC0	0x5044#define APMU_DFC	0x6045#define MPMU_UART_PLL	0x1446 47#define NR_CLKS		20048 49struct pxa910_clk_unit {50	struct mmp_clk_unit unit;51	void __iomem *mpmu_base;52	void __iomem *apmu_base;53	void __iomem *apbc_base;54	void __iomem *apbcp_base;55};56 57static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = {58	{PXA910_CLK_CLK32, "clk32", NULL, 0, 32768},59	{PXA910_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000},60	{PXA910_CLK_PLL1, "pll1", NULL, 0, 624000000},61	{PXA910_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000},62};63 64static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = {65	{PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0},66	{PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0},67	{PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0},68	{PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0},69	{PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0},70	{PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0},71	{PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0},72	{PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0},73	{PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0},74	{PXA910_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0},75	{PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0},76	{PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0},77	{PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0},78	{PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0},79};80 81static struct mmp_clk_factor_masks uart_factor_masks = {82	.factor = 2,83	.num_mask = 0x1fff,84	.den_mask = 0x1fff,85	.num_shift = 16,86	.den_shift = 0,87};88 89static struct mmp_clk_factor_tbl uart_factor_tbl[] = {90	{.num = 8125, .den = 1536},	/*14.745MHZ */91};92 93static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit)94{95	struct clk *clk;96	struct mmp_clk_unit *unit = &pxa_unit->unit;97 98	mmp_register_fixed_rate_clks(unit, fixed_rate_clks,99					ARRAY_SIZE(fixed_rate_clks));100 101	mmp_register_fixed_factor_clks(unit, fixed_factor_clks,102					ARRAY_SIZE(fixed_factor_clks));103 104	clk = mmp_clk_register_factor("uart_pll", "pll1_4",105				CLK_SET_RATE_PARENT,106				pxa_unit->mpmu_base + MPMU_UART_PLL,107				&uart_factor_masks, uart_factor_tbl,108				ARRAY_SIZE(uart_factor_tbl), NULL);109	mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk);110}111 112static DEFINE_SPINLOCK(uart0_lock);113static DEFINE_SPINLOCK(uart1_lock);114static DEFINE_SPINLOCK(uart2_lock);115static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"};116 117static DEFINE_SPINLOCK(ssp0_lock);118static DEFINE_SPINLOCK(ssp1_lock);119static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"};120 121static DEFINE_SPINLOCK(timer0_lock);122static DEFINE_SPINLOCK(timer1_lock);123static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96"};124 125static DEFINE_SPINLOCK(reset_lock);126 127static struct mmp_param_mux_clk apbc_mux_clks[] = {128	{0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock},129	{0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock},130	{0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock},131	{0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock},132	{0, "timer0_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER0, 4, 3, 0, &timer0_lock},133	{0, "timer1_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER1, 4, 3, 0, &timer1_lock},134};135 136static struct mmp_param_mux_clk apbcp_mux_clks[] = {137	{0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock},138};139 140static struct mmp_param_gate_clk apbc_gate_clks[] = {141	{PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock},142	{PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock},143	{PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},144	{PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL},145	{PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock},146	{PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock},147	{PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock},148	{PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock},149	/* The gate clocks has mux parent. */150	{PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock},151	{PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock},152	{PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock},153	{PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock},154	{PXA910_CLK_TIMER0, "timer0_clk", "timer0_mux", CLK_SET_RATE_PARENT, APBC_TIMER0, 0x3, 0x3, 0x0, 0, &timer0_lock},155	{PXA910_CLK_TIMER1, "timer1_clk", "timer1_mux", CLK_SET_RATE_PARENT, APBC_TIMER1, 0x3, 0x3, 0x0, 0, &timer1_lock},156};157 158static struct mmp_param_gate_clk apbcp_gate_clks[] = {159	{PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock},160	/* The gate clocks has mux parent. */161	{PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock},162};163 164static void pxa910_apb_periph_clk_init(struct pxa910_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_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base,172				ARRAY_SIZE(apbcp_mux_clks));173 174	mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base,175				ARRAY_SIZE(apbc_gate_clks));176 177	mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base,178				ARRAY_SIZE(apbcp_gate_clks));179}180 181static DEFINE_SPINLOCK(sdh0_lock);182static DEFINE_SPINLOCK(sdh1_lock);183static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"};184 185static DEFINE_SPINLOCK(usb_lock);186 187static DEFINE_SPINLOCK(disp0_lock);188static const char *disp_parent_names[] = {"pll1_2", "pll1_12"};189 190static DEFINE_SPINLOCK(ccic0_lock);191static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"};192static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"};193 194static struct mmp_param_mux_clk apmu_mux_clks[] = {195	{0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock},196	{0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock},197	{0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock},198	{0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock},199	{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},200};201 202static struct mmp_param_div_clk apmu_div_clks[] = {203	{0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock},204};205 206static struct mmp_param_gate_clk apmu_gate_clks[] = {207	{PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL},208	{PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock},209	{PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock},210	/* The gate clocks has mux parent. */211	{PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock},212	{PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock},213	{PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock},214	{PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock},215	{PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock},216	{PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock},217};218 219static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit)220{221	struct mmp_clk_unit *unit = &pxa_unit->unit;222 223	mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base,224				ARRAY_SIZE(apmu_mux_clks));225 226	mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base,227				ARRAY_SIZE(apmu_div_clks));228 229	mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base,230				ARRAY_SIZE(apmu_gate_clks));231}232 233static void pxa910_clk_reset_init(struct device_node *np,234				struct pxa910_clk_unit *pxa_unit)235{236	struct mmp_clk_reset_cell *cells;237	int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets;238 239	nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks);240	nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks);241	nr_resets = nr_resets_apbc + nr_resets_apbcp;242	cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL);243	if (!cells)244		return;245 246	base = 0;247	for (i = 0; i < nr_resets_apbc; i++) {248		cells[base + i].clk_id = apbc_gate_clks[i].id;249		cells[base + i].reg =250			pxa_unit->apbc_base + apbc_gate_clks[i].offset;251		cells[base + i].flags = 0;252		cells[base + i].lock = apbc_gate_clks[i].lock;253		cells[base + i].bits = 0x4;254	}255 256	base = nr_resets_apbc;257	for (i = 0; i < nr_resets_apbcp; i++) {258		cells[base + i].clk_id = apbcp_gate_clks[i].id;259		cells[base + i].reg =260			pxa_unit->apbc_base + apbc_gate_clks[i].offset;261		cells[base + i].flags = 0;262		cells[base + i].lock = apbc_gate_clks[i].lock;263		cells[base + i].bits = 0x4;264	}265 266	mmp_clk_reset_register(np, cells, nr_resets);267}268 269static void __init pxa910_clk_init(struct device_node *np)270{271	struct pxa910_clk_unit *pxa_unit;272 273	pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL);274	if (!pxa_unit)275		return;276 277	pxa_unit->mpmu_base = of_iomap(np, 0);278	if (!pxa_unit->mpmu_base) {279		pr_err("failed to map mpmu registers\n");280		goto free_memory;281	}282 283	pxa_unit->apmu_base = of_iomap(np, 1);284	if (!pxa_unit->apmu_base) {285		pr_err("failed to map apmu registers\n");286		goto unmap_mpmu_region;287	}288 289	pxa_unit->apbc_base = of_iomap(np, 2);290	if (!pxa_unit->apbc_base) {291		pr_err("failed to map apbc registers\n");292		goto unmap_apmu_region;293	}294 295	pxa_unit->apbcp_base = of_iomap(np, 3);296	if (!pxa_unit->apbcp_base) {297		pr_err("failed to map apbcp registers\n");298		goto unmap_apbc_region;299	}300 301	mmp_clk_init(np, &pxa_unit->unit, NR_CLKS);302 303	pxa910_pll_init(pxa_unit);304 305	pxa910_apb_periph_clk_init(pxa_unit);306 307	pxa910_axi_periph_clk_init(pxa_unit);308 309	pxa910_clk_reset_init(np, pxa_unit);310 311	return;312 313unmap_apbc_region:314	iounmap(pxa_unit->apbc_base);315unmap_apmu_region:316	iounmap(pxa_unit->apmu_base);317unmap_mpmu_region:318	iounmap(pxa_unit->mpmu_base);319free_memory:320	kfree(pxa_unit);321}322 323CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init);324