[deliverable/linux.git] / drivers / video / fbdev / omap2 / dss / pll.c

/*
 * Copyright (C) 2014 Texas Instruments Incorporated
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#define DSS_SUBSYS_NAME "PLL"

#include <linux/clk.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/regulator/consumer.h>
#include <linux/sched.h>

#include <video/omapdss.h>

#include "dss.h"

#define PLL_CONTROL			0x0000
#define PLL_STATUS			0x0004
#define PLL_GO				0x0008
#define PLL_CONFIGURATION1		0x000C
#define PLL_CONFIGURATION2		0x0010
#define PLL_CONFIGURATION3		0x0014
#define PLL_SSC_CONFIGURATION1		0x0018
#define PLL_SSC_CONFIGURATION2		0x001C
#define PLL_CONFIGURATION4		0x0020

static struct dss_pll *dss_plls[4];

int dss_pll_register(struct dss_pll *pll)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
		if (!dss_plls[i]) {
			dss_plls[i] = pll;
			return 0;
		}
	}

	return -EBUSY;
}

void dss_pll_unregister(struct dss_pll *pll)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
		if (dss_plls[i] == pll) {
			dss_plls[i] = NULL;
			return;
		}
	}
}

struct dss_pll *dss_pll_find(const char *name)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
		if (dss_plls[i] && strcmp(dss_plls[i]->name, name) == 0)
			return dss_plls[i];
	}

	return NULL;
}

int dss_pll_enable(struct dss_pll *pll)
{
	int r;

	r = clk_prepare_enable(pll->clkin);
	if (r)
		return r;

	if (pll->regulator) {
		r = regulator_enable(pll->regulator);
		if (r)
			goto err_reg;
	}

	r = pll->ops->enable(pll);
	if (r)
		goto err_enable;

	return 0;

err_enable:
	if (pll->regulator)
		regulator_disable(pll->regulator);
err_reg:
	clk_disable_unprepare(pll->clkin);
	return r;
}

void dss_pll_disable(struct dss_pll *pll)
{
	pll->ops->disable(pll);

	if (pll->regulator)
		regulator_disable(pll->regulator);

	clk_disable_unprepare(pll->clkin);

	memset(&pll->cinfo, 0, sizeof(pll->cinfo));
}

int dss_pll_set_config(struct dss_pll *pll, const struct dss_pll_clock_info *cinfo)
{
	int r;

	r = pll->ops->set_config(pll, cinfo);
	if (r)
		return r;

	pll->cinfo = *cinfo;

	return 0;
}

bool dss_pll_hsdiv_calc(const struct dss_pll *pll, unsigned long clkdco,
		unsigned long out_min, unsigned long out_max,
		dss_hsdiv_calc_func func, void *data)
{
	const struct dss_pll_hw *hw = pll->hw;
	int m, m_start, m_stop;
	unsigned long out;

	out_min = out_min ? out_min : 1;
	out_max = out_max ? out_max : ULONG_MAX;

	m_start = max(DIV_ROUND_UP(clkdco, out_max), 1ul);

	m_stop = min((unsigned)(clkdco / out_min), hw->mX_max);

	for (m = m_start; m <= m_stop; ++m) {
		out = clkdco / m;

		if (func(m, out, data))
			return true;
	}

	return false;
}

bool dss_pll_calc(const struct dss_pll *pll, unsigned long clkin,
		unsigned long pll_min, unsigned long pll_max,
		dss_pll_calc_func func, void *data)
{
	const struct dss_pll_hw *hw = pll->hw;
	int n, n_start, n_stop;
	int m, m_start, m_stop;
	unsigned long fint, clkdco;
	unsigned long pll_hw_max;
	unsigned long fint_hw_min, fint_hw_max;

	pll_hw_max = hw->clkdco_max;

	fint_hw_min = hw->fint_min;
	fint_hw_max = hw->fint_max;

	n_start = max(DIV_ROUND_UP(clkin, fint_hw_max), 1ul);
	n_stop = min((unsigned)(clkin / fint_hw_min), hw->n_max);

	pll_max = pll_max ? pll_max : ULONG_MAX;

	for (n = n_start; n <= n_stop; ++n) {
		fint = clkin / n;

		m_start = max(DIV_ROUND_UP(DIV_ROUND_UP(pll_min, fint), 2),
				1ul);
		m_stop = min3((unsigned)(pll_max / fint / 2),
				(unsigned)(pll_hw_max / fint / 2),
				hw->m_max);

		for (m = m_start; m <= m_stop; ++m) {
			clkdco = 2 * m * fint;

			if (func(n, m, fint, clkdco, data))
				return true;
		}
	}

	return false;
}

static int wait_for_bit_change(void __iomem *reg, int bitnum, int value)
{
	unsigned long timeout;
	ktime_t wait;
	int t;

	/* first busyloop to see if the bit changes right away */
	t = 100;
	while (t-- > 0) {
		if (FLD_GET(readl_relaxed(reg), bitnum, bitnum) == value)
			return value;
	}

	/* then loop for 500ms, sleeping for 1ms in between */
	timeout = jiffies + msecs_to_jiffies(500);
	while (time_before(jiffies, timeout)) {
		if (FLD_GET(readl_relaxed(reg), bitnum, bitnum) == value)
			return value;

		wait = ns_to_ktime(1000 * 1000);
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
	}

	return !value;
}

static int dss_wait_hsdiv_ack(struct dss_pll *pll, u32 hsdiv_ack_mask)
{
	int t = 100;

	while (t-- > 0) {
		u32 v = readl_relaxed(pll->base + PLL_STATUS);
		v &= hsdiv_ack_mask;
		if (v == hsdiv_ack_mask)
			return 0;
	}

	return -ETIMEDOUT;
}

int dss_pll_write_config_type_a(struct dss_pll *pll,
		const struct dss_pll_clock_info *cinfo)
{
	const struct dss_pll_hw *hw = pll->hw;
	void __iomem *base = pll->base;
	int r = 0;
	u32 l;

	l = 0;
	if (hw->has_stopmode)
		l = FLD_MOD(l, 1, 0, 0);		/* PLL_STOPMODE */
	l = FLD_MOD(l, cinfo->n - 1, hw->n_msb, hw->n_lsb);	/* PLL_REGN */
	l = FLD_MOD(l, cinfo->m, hw->m_msb, hw->m_lsb);		/* PLL_REGM */
	/* M4 */
	l = FLD_MOD(l, cinfo->mX[0] ? cinfo->mX[0] - 1 : 0,
			hw->mX_msb[0], hw->mX_lsb[0]);
	/* M5 */
	l = FLD_MOD(l, cinfo->mX[1] ? cinfo->mX[1] - 1 : 0,
			hw->mX_msb[1], hw->mX_lsb[1]);
	writel_relaxed(l, base + PLL_CONFIGURATION1);

	l = 0;
	/* M6 */
	l = FLD_MOD(l, cinfo->mX[2] ? cinfo->mX[2] - 1 : 0,
			hw->mX_msb[2], hw->mX_lsb[2]);
	/* M7 */
	l = FLD_MOD(l, cinfo->mX[3] ? cinfo->mX[3] - 1 : 0,
			hw->mX_msb[3], hw->mX_lsb[3]);
	writel_relaxed(l, base + PLL_CONFIGURATION3);

	l = readl_relaxed(base + PLL_CONFIGURATION2);
	if (hw->has_freqsel) {
		u32 f = cinfo->fint < 1000000 ? 0x3 :
			cinfo->fint < 1250000 ? 0x4 :
			cinfo->fint < 1500000 ? 0x5 :
			cinfo->fint < 1750000 ? 0x6 :
			0x7;

		l = FLD_MOD(l, f, 4, 1);	/* PLL_FREQSEL */
	} else if (hw->has_selfreqdco) {
		u32 f = cinfo->clkdco < hw->clkdco_low ? 0x2 : 0x4;

		l = FLD_MOD(l, f, 3, 1);	/* PLL_SELFREQDCO */
	}
	l = FLD_MOD(l, 1, 13, 13);		/* PLL_REFEN */
	l = FLD_MOD(l, 0, 14, 14);		/* PHY_CLKINEN */
	l = FLD_MOD(l, 0, 16, 16);		/* M4_CLOCK_EN */
	l = FLD_MOD(l, 0, 18, 18);		/* M5_CLOCK_EN */
	l = FLD_MOD(l, 1, 20, 20);		/* HSDIVBYPASS */
	if (hw->has_refsel)
		l = FLD_MOD(l, 3, 22, 21);	/* REFSEL = sysclk */
	l = FLD_MOD(l, 0, 23, 23);		/* M6_CLOCK_EN */
	l = FLD_MOD(l, 0, 25, 25);		/* M7_CLOCK_EN */
	writel_relaxed(l, base + PLL_CONFIGURATION2);

	writel_relaxed(1, base + PLL_GO);	/* PLL_GO */

	if (wait_for_bit_change(base + PLL_GO, 0, 0) != 0) {
		DSSERR("DSS DPLL GO bit not going down.\n");
		r = -EIO;
		goto err;
	}

	if (wait_for_bit_change(base + PLL_STATUS, 1, 1) != 1) {
		DSSERR("cannot lock DSS DPLL\n");
		r = -EIO;
		goto err;
	}

	l = readl_relaxed(base + PLL_CONFIGURATION2);
	l = FLD_MOD(l, 1, 14, 14);			/* PHY_CLKINEN */
	l = FLD_MOD(l, cinfo->mX[0] ? 1 : 0, 16, 16);	/* M4_CLOCK_EN */
	l = FLD_MOD(l, cinfo->mX[1] ? 1 : 0, 18, 18);	/* M5_CLOCK_EN */
	l = FLD_MOD(l, 0, 20, 20);			/* HSDIVBYPASS */
	l = FLD_MOD(l, cinfo->mX[2] ? 1 : 0, 23, 23);	/* M6_CLOCK_EN */
	l = FLD_MOD(l, cinfo->mX[3] ? 1 : 0, 25, 25);	/* M7_CLOCK_EN */
	writel_relaxed(l, base + PLL_CONFIGURATION2);

	r = dss_wait_hsdiv_ack(pll,
		(cinfo->mX[0] ? BIT(7) : 0) |
		(cinfo->mX[1] ? BIT(8) : 0) |
		(cinfo->mX[2] ? BIT(10) : 0) |
		(cinfo->mX[3] ? BIT(11) : 0));
	if (r) {
		DSSERR("failed to enable HSDIV clocks\n");
		goto err;
	}

err:
	return r;
}

int dss_pll_write_config_type_b(struct dss_pll *pll,
		const struct dss_pll_clock_info *cinfo)
{
	const struct dss_pll_hw *hw = pll->hw;
	void __iomem *base = pll->base;
	u32 l;

	l = 0;
	l = FLD_MOD(l, cinfo->m, 20, 9);	/* PLL_REGM */
	l = FLD_MOD(l, cinfo->n - 1, 8, 1);	/* PLL_REGN */
	writel_relaxed(l, base + PLL_CONFIGURATION1);

	l = readl_relaxed(base + PLL_CONFIGURATION2);
	l = FLD_MOD(l, 0x0, 12, 12);	/* PLL_HIGHFREQ divide by 2 */
	l = FLD_MOD(l, 0x1, 13, 13);	/* PLL_REFEN */
	l = FLD_MOD(l, 0x0, 14, 14);	/* PHY_CLKINEN */
	if (hw->has_refsel)
		l = FLD_MOD(l, 0x3, 22, 21);	/* REFSEL = SYSCLK */

	/* PLL_SELFREQDCO */
	if (cinfo->clkdco > hw->clkdco_low)
		l = FLD_MOD(l, 0x4, 3, 1);
	else
		l = FLD_MOD(l, 0x2, 3, 1);
	writel_relaxed(l, base + PLL_CONFIGURATION2);

	l = readl_relaxed(base + PLL_CONFIGURATION3);
	l = FLD_MOD(l, cinfo->sd, 17, 10);	/* PLL_REGSD */
	writel_relaxed(l, base + PLL_CONFIGURATION3);

	l = readl_relaxed(base + PLL_CONFIGURATION4);
	l = FLD_MOD(l, cinfo->mX[0], 24, 18);	/* PLL_REGM2 */
	l = FLD_MOD(l, cinfo->mf, 17, 0);	/* PLL_REGM_F */
	writel_relaxed(l, base + PLL_CONFIGURATION4);

	writel_relaxed(1, base + PLL_GO);	/* PLL_GO */

	if (wait_for_bit_change(base + PLL_GO, 0, 0) != 0) {
		DSSERR("DSS DPLL GO bit not going down.\n");
		return -EIO;
	}

	if (wait_for_bit_change(base + PLL_STATUS, 1, 1) != 1) {
		DSSERR("cannot lock DSS DPLL\n");
		return -ETIMEDOUT;
	}

	return 0;
}
Commit	Line	Data
0a20170a TV	1	/*
	2	* Copyright (C) 2014 Texas Instruments Incorporated
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License version 2 as published by
	6	* the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16
	17	#define DSS_SUBSYS_NAME "PLL"
	18
	19	#include <linux/clk.h>
	20	#include <linux/io.h>
	21	#include <linux/kernel.h>
	22	#include <linux/regulator/consumer.h>
	23	#include <linux/sched.h>
	24
	25	#include <video/omapdss.h>
	26
	27	#include "dss.h"
	28
	29	#define PLL_CONTROL 0x0000
	30	#define PLL_STATUS 0x0004
	31	#define PLL_GO 0x0008
	32	#define PLL_CONFIGURATION1 0x000C
	33	#define PLL_CONFIGURATION2 0x0010
	34	#define PLL_CONFIGURATION3 0x0014
	35	#define PLL_SSC_CONFIGURATION1 0x0018
	36	#define PLL_SSC_CONFIGURATION2 0x001C
	37	#define PLL_CONFIGURATION4 0x0020
	38
	39	static struct dss_pll *dss_plls[4];
	40
	41	int dss_pll_register(struct dss_pll *pll)
	42	{
	43	int i;
	44
	45	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
	46	if (!dss_plls[i]) {
	47	dss_plls[i] = pll;
	48	return 0;
	49	}
	50	}
	51
	52	return -EBUSY;
	53	}
	54
	55	void dss_pll_unregister(struct dss_pll *pll)
	56	{
	57	int i;
	58
	59	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
	60	if (dss_plls[i] == pll) {
	61	dss_plls[i] = NULL;
	62	return;
	63	}
	64	}
65	}
66
67	struct dss_pll dss_pll_find(const char name)
68	{
69	int i;
70
71	for (i = 0; i < ARRAY_SIZE(dss_plls); ++i) {
72	if (dss_plls[i] && strcmp(dss_plls[i]->name, name) == 0)
73	return dss_plls[i];
74	}
75
76	return NULL;
77	}
78
79	int dss_pll_enable(struct dss_pll *pll)
80	{
81	int r;
82
83	r = clk_prepare_enable(pll->clkin);
84	if (r)
85	return r;
86
87	if (pll->regulator) {
88	r = regulator_enable(pll->regulator);
89	if (r)
90	goto err_reg;
91	}
92
93	r = pll->ops->enable(pll);
94	if (r)
95	goto err_enable;
96
97	return 0;
98
99	err_enable:
811174f4 DC	100	if (pll->regulator)
811174f4 DC	101	regulator_disable(pll->regulator);
0a20170a TV	102	err_reg:
	103	clk_disable_unprepare(pll->clkin);
	104	return r;
	105	}
	106
	107	void dss_pll_disable(struct dss_pll *pll)
	108	{
	109	pll->ops->disable(pll);
	110
	111	if (pll->regulator)
	112	regulator_disable(pll->regulator);
	113
	114	clk_disable_unprepare(pll->clkin);
	115
	116	memset(&pll->cinfo, 0, sizeof(pll->cinfo));
	117	}
	118
	119	int dss_pll_set_config(struct dss_pll pll, const struct dss_pll_clock_info cinfo)
	120	{
	121	int r;
	122
	123	r = pll->ops->set_config(pll, cinfo);
	124	if (r)
	125	return r;
	126
	127	pll->cinfo = *cinfo;
	128
	129	return 0;
	130	}
	131
	132	bool dss_pll_hsdiv_calc(const struct dss_pll *pll, unsigned long clkdco,
	133	unsigned long out_min, unsigned long out_max,
	134	dss_hsdiv_calc_func func, void *data)
	135	{
	136	const struct dss_pll_hw *hw = pll->hw;
	137	int m, m_start, m_stop;
	138	unsigned long out;
	139
	140	out_min = out_min ? out_min : 1;
	141	out_max = out_max ? out_max : ULONG_MAX;
	142
	143	m_start = max(DIV_ROUND_UP(clkdco, out_max), 1ul);
	144
	145	m_stop = min((unsigned)(clkdco / out_min), hw->mX_max);
	146
	147	for (m = m_start; m <= m_stop; ++m) {
	148	out = clkdco / m;
	149
	150	if (func(m, out, data))
	151	return true;
	152	}
	153
	154	return false;
	155	}
	156
	157	bool dss_pll_calc(const struct dss_pll *pll, unsigned long clkin,
	158	unsigned long pll_min, unsigned long pll_max,
	159	dss_pll_calc_func func, void *data)
	160	{
	161	const struct dss_pll_hw *hw = pll->hw;
	162	int n, n_start, n_stop;
	163	int m, m_start, m_stop;
	164	unsigned long fint, clkdco;
	165	unsigned long pll_hw_max;
166	unsigned long fint_hw_min, fint_hw_max;
167
168	pll_hw_max = hw->clkdco_max;
169
170	fint_hw_min = hw->fint_min;
171	fint_hw_max = hw->fint_max;
172
173	n_start = max(DIV_ROUND_UP(clkin, fint_hw_max), 1ul);
174	n_stop = min((unsigned)(clkin / fint_hw_min), hw->n_max);
175
176	pll_max = pll_max ? pll_max : ULONG_MAX;
177
178	for (n = n_start; n <= n_stop; ++n) {
179	fint = clkin / n;
180
181	m_start = max(DIV_ROUND_UP(DIV_ROUND_UP(pll_min, fint), 2),
182	1ul);
183	m_stop = min3((unsigned)(pll_max / fint / 2),
184	(unsigned)(pll_hw_max / fint / 2),
185	hw->m_max);
186
187	for (m = m_start; m <= m_stop; ++m) {
188	clkdco = 2 * m * fint;
189
190	if (func(n, m, fint, clkdco, data))
191	return true;
192	}
193	}
194
195	return false;
196	}
197
198	static int wait_for_bit_change(void __iomem *reg, int bitnum, int value)
199	{
200	unsigned long timeout;
201	ktime_t wait;
202	int t;
203
204	/* first busyloop to see if the bit changes right away */
205	t = 100;
206	while (t-- > 0) {
207	if (FLD_GET(readl_relaxed(reg), bitnum, bitnum) == value)
208	return value;
209	}
210
211	/* then loop for 500ms, sleeping for 1ms in between */
212	timeout = jiffies + msecs_to_jiffies(500);
213	while (time_before(jiffies, timeout)) {
214	if (FLD_GET(readl_relaxed(reg), bitnum, bitnum) == value)
215	return value;
216
217	wait = ns_to_ktime(1000 * 1000);
218	set_current_state(TASK_UNINTERRUPTIBLE);
219	schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
220	}
221
222	return !value;
223	}
224
225	static int dss_wait_hsdiv_ack(struct dss_pll *pll, u32 hsdiv_ack_mask)
226	{
227	int t = 100;
228
229	while (t-- > 0) {
230	u32 v = readl_relaxed(pll->base + PLL_STATUS);
231	v &= hsdiv_ack_mask;
232	if (v == hsdiv_ack_mask)
233	return 0;
234	}
235
236	return -ETIMEDOUT;
237	}
238
239	int dss_pll_write_config_type_a(struct dss_pll *pll,
240	const struct dss_pll_clock_info *cinfo)
241	{
242	const struct dss_pll_hw *hw = pll->hw;
243	void __iomem *base = pll->base;
244	int r = 0;
245	u32 l;
246
247	l = 0;
248	if (hw->has_stopmode)
249	l = FLD_MOD(l, 1, 0, 0); /* PLL_STOPMODE */
250	l = FLD_MOD(l, cinfo->n - 1, hw->n_msb, hw->n_lsb); /* PLL_REGN */
251	l = FLD_MOD(l, cinfo->m, hw->m_msb, hw->m_lsb); /* PLL_REGM */
252	/* M4 */
253	l = FLD_MOD(l, cinfo->mX[0] ? cinfo->mX[0] - 1 : 0,
254	hw->mX_msb[0], hw->mX_lsb[0]);
255	/* M5 */
256	l = FLD_MOD(l, cinfo->mX[1] ? cinfo->mX[1] - 1 : 0,
257	hw->mX_msb[1], hw->mX_lsb[1]);
258	writel_relaxed(l, base + PLL_CONFIGURATION1);
259
260	l = 0;
261	/* M6 */
262	l = FLD_MOD(l, cinfo->mX[2] ? cinfo->mX[2] - 1 : 0,
263	hw->mX_msb[2], hw->mX_lsb[2]);
264	/* M7 */
265	l = FLD_MOD(l, cinfo->mX[3] ? cinfo->mX[3] - 1 : 0,
266	hw->mX_msb[3], hw->mX_lsb[3]);
267	writel_relaxed(l, base + PLL_CONFIGURATION3);
268
269	l = readl_relaxed(base + PLL_CONFIGURATION2);
270	if (hw->has_freqsel) {
271	u32 f = cinfo->fint < 1000000 ? 0x3 :
272	cinfo->fint < 1250000 ? 0x4 :
273	cinfo->fint < 1500000 ? 0x5 :
274	cinfo->fint < 1750000 ? 0x6 :
275	0x7;
276
277	l = FLD_MOD(l, f, 4, 1); /* PLL_FREQSEL */
278	} else if (hw->has_selfreqdco) {
279	u32 f = cinfo->clkdco < hw->clkdco_low ? 0x2 : 0x4;
280
281	l = FLD_MOD(l, f, 3, 1); /* PLL_SELFREQDCO */
282	}
283	l = FLD_MOD(l, 1, 13, 13); /* PLL_REFEN */
284	l = FLD_MOD(l, 0, 14, 14); /* PHY_CLKINEN */
285	l = FLD_MOD(l, 0, 16, 16); /* M4_CLOCK_EN */
286	l = FLD_MOD(l, 0, 18, 18); /* M5_CLOCK_EN */
287	l = FLD_MOD(l, 1, 20, 20); /* HSDIVBYPASS */
288	if (hw->has_refsel)
289	l = FLD_MOD(l, 3, 22, 21); /* REFSEL = sysclk */
290	l = FLD_MOD(l, 0, 23, 23); /* M6_CLOCK_EN */
291	l = FLD_MOD(l, 0, 25, 25); /* M7_CLOCK_EN */
292	writel_relaxed(l, base + PLL_CONFIGURATION2);
293
294	writel_relaxed(1, base + PLL_GO); /* PLL_GO */
295
296	if (wait_for_bit_change(base + PLL_GO, 0, 0) != 0) {
297	DSSERR("DSS DPLL GO bit not going down.\n");
298	r = -EIO;
299	goto err;
300	}
301
302	if (wait_for_bit_change(base + PLL_STATUS, 1, 1) != 1) {
303	DSSERR("cannot lock DSS DPLL\n");
304	r = -EIO;
305	goto err;
306	}
307
308	l = readl_relaxed(base + PLL_CONFIGURATION2);
309	l = FLD_MOD(l, 1, 14, 14); /* PHY_CLKINEN */
310	l = FLD_MOD(l, cinfo->mX[0] ? 1 : 0, 16, 16); /* M4_CLOCK_EN */
311	l = FLD_MOD(l, cinfo->mX[1] ? 1 : 0, 18, 18); /* M5_CLOCK_EN */
312	l = FLD_MOD(l, 0, 20, 20); /* HSDIVBYPASS */
313	l = FLD_MOD(l, cinfo->mX[2] ? 1 : 0, 23, 23); /* M6_CLOCK_EN */
314	l = FLD_MOD(l, cinfo->mX[3] ? 1 : 0, 25, 25); /* M7_CLOCK_EN */
315	writel_relaxed(l, base + PLL_CONFIGURATION2);
316
317	r = dss_wait_hsdiv_ack(pll,
318	(cinfo->mX[0] ? BIT(7) : 0) \|
319	(cinfo->mX[1] ? BIT(8) : 0) \|
320	(cinfo->mX[2] ? BIT(10) : 0) \|
321	(cinfo->mX[3] ? BIT(11) : 0));
322	if (r) {
323	DSSERR("failed to enable HSDIV clocks\n");
324	goto err;
325	}
326
327	err:
328	return r;
329	}
330
331	int dss_pll_write_config_type_b(struct dss_pll *pll,
332	const struct dss_pll_clock_info *cinfo)
333	{
334	const struct dss_pll_hw *hw = pll->hw;
335	void __iomem *base = pll->base;
336	u32 l;
337
338	l = 0;
339	l = FLD_MOD(l, cinfo->m, 20, 9); /* PLL_REGM */
340	l = FLD_MOD(l, cinfo->n - 1, 8, 1); /* PLL_REGN */
341	writel_relaxed(l, base + PLL_CONFIGURATION1);
342
343	l = readl_relaxed(base + PLL_CONFIGURATION2);
344	l = FLD_MOD(l, 0x0, 12, 12); /* PLL_HIGHFREQ divide by 2 */
345	l = FLD_MOD(l, 0x1, 13, 13); /* PLL_REFEN */
346	l = FLD_MOD(l, 0x0, 14, 14); /* PHY_CLKINEN */
347	if (hw->has_refsel)
348	l = FLD_MOD(l, 0x3, 22, 21); /* REFSEL = SYSCLK */
349
350	/* PLL_SELFREQDCO */
351	if (cinfo->clkdco > hw->clkdco_low)
352	l = FLD_MOD(l, 0x4, 3, 1);
353	else
354	l = FLD_MOD(l, 0x2, 3, 1);
355	writel_relaxed(l, base + PLL_CONFIGURATION2);
356
357	l = readl_relaxed(base + PLL_CONFIGURATION3);
358	l = FLD_MOD(l, cinfo->sd, 17, 10); /* PLL_REGSD */
359	writel_relaxed(l, base + PLL_CONFIGURATION3);
360
361	l = readl_relaxed(base + PLL_CONFIGURATION4);
362	l = FLD_MOD(l, cinfo->mX[0], 24, 18); /* PLL_REGM2 */
363	l = FLD_MOD(l, cinfo->mf, 17, 0); /* PLL_REGM_F */
364	writel_relaxed(l, base + PLL_CONFIGURATION4);
365
366	writel_relaxed(1, base + PLL_GO); /* PLL_GO */
367
368	if (wait_for_bit_change(base + PLL_GO, 0, 0) != 0) {
369	DSSERR("DSS DPLL GO bit not going down.\n");
370	return -EIO;
371	}
372
373	if (wait_for_bit_change(base + PLL_STATUS, 1, 1) != 1) {
374	DSSERR("cannot lock DSS DPLL\n");
375	return -ETIMEDOUT;
376	}
377
378	return 0;
379	}