[J-u-boot.git] / drivers / misc / fsl_pmic.c

/*
 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>
#include <common.h>
#include <spi.h>
#include <asm/errno.h>
#include <linux/types.h>
#include <fsl_pmic.h>

static struct spi_slave *slave;

struct spi_slave *pmic_spi_probe(void)
{
	return spi_setup_slave(CONFIG_FSL_PMIC_BUS,
		CONFIG_FSL_PMIC_CS,
		CONFIG_FSL_PMIC_CLK,
		CONFIG_FSL_PMIC_MODE);
}

void pmic_spi_free(struct spi_slave *slave)
{
	if (slave)
		spi_free_slave(slave);
}

u32 pmic_reg(u32 reg, u32 val, u32 write)
{
	u32 pmic_tx, pmic_rx;
	u32 tmp;

	if (!slave) {
		slave = pmic_spi_probe();

		if (!slave)
			return -1;
	}

	if (reg > 63 || write > 1) {
		printf("<reg num> = %d is invalid. Should be less then 63\n",
			reg);
		return -1;
	}

	if (spi_claim_bus(slave))
		return -1;

	pmic_tx = (write << 31) | (reg << 25) | (val & 0x00FFFFFF);

	tmp = cpu_to_be32(pmic_tx);

	if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
			SPI_XFER_BEGIN | SPI_XFER_END)) {
		spi_release_bus(slave);
		return -1;
	}

	if (write) {
		pmic_tx &= ~(1 << 31);
		tmp = cpu_to_be32(pmic_tx);
		if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
			SPI_XFER_BEGIN | SPI_XFER_END)) {
			spi_release_bus(slave);
			return -1;
		}
	}

	spi_release_bus(slave);
	return cpu_to_be32(pmic_rx);
}

void pmic_reg_write(u32 reg, u32 value)
{
	pmic_reg(reg, value, 1);
}

u32 pmic_reg_read(u32 reg)
{
	return pmic_reg(reg, 0, 0);
}

void pmic_show_pmic_info(void)
{
	u32 rev_id;

	rev_id = pmic_reg_read(REG_IDENTIFICATION);
	printf("PMIC ID: 0x%08x [Rev: ", rev_id);
	switch (rev_id & 0x1F) {
	case 0x1:
		puts("1.0");
		break;
	case 0x9:
		puts("1.1");
		break;
	case 0xA:
		puts("1.2");
		break;
	case 0x10:
		puts("2.0");
		break;
	case 0x11:
		puts("2.1");
		break;
	case 0x18:
		puts("3.0");
		break;
	case 0x19:
		puts("3.1");
		break;
	case 0x1A:
		puts("3.2");
		break;
	case 0x2:
		puts("3.2A");
		break;
	case 0x1B:
		puts("3.3");
		break;
	case 0x1D:
		puts("3.5");
		break;
	default:
		puts("unknown");
		break;
	}
	puts("]\n");
}

static void pmic_dump(int numregs)
{
	u32 val;
	int i;

	pmic_show_pmic_info();
	for (i = 0; i < numregs; i++) {
		val = pmic_reg_read(i);
		if (!(i % 8))
			printf ("\n0x%02x: ", i);
		printf("%08x ", val);
	}
	puts("\n");
}

int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	char *cmd;
	int nregs;
	u32 val;

	/* at least two arguments please */
	if (argc < 2)
		return cmd_usage(cmdtp);

	cmd = argv[1];
	if (strcmp(cmd, "dump") == 0) {
		if (argc < 3)
			return cmd_usage(cmdtp);

		nregs = simple_strtoul(argv[2], NULL, 16);
		pmic_dump(nregs);
		return 0;
	}
	if (strcmp(cmd, "write") == 0) {
		if (argc < 4)
			return cmd_usage(cmdtp);

		nregs = simple_strtoul(argv[2], NULL, 16);
		val = simple_strtoul(argv[3], NULL, 16);
		pmic_reg_write(nregs, val);
		return 0;
	}
	/* No subcommand found */
	return 1;
}

U_BOOT_CMD(
	pmic,	CONFIG_SYS_MAXARGS, 1, do_pmic,
	"Freescale PMIC (Atlas)",
	"dump [numregs] dump registers\n"
	"pmic write <reg> <value> - write register"
);
Commit	Line	Data
28bb6d34 SB	1	/*
	2	* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
	3	*
	4	* See file CREDITS for list of people who contributed to this
	5	* project.
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 of
	10	* the License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	20	* MA 02111-1307 USA
	21	*/
	22
	23	#include <config.h>
	24	#include <common.h>
	25	#include <spi.h>
	26	#include <asm/errno.h>
	27	#include <linux/types.h>
	28	#include <fsl_pmic.h>
	29
	30	static struct spi_slave *slave;
	31
	32	struct spi_slave *pmic_spi_probe(void)
	33	{
	34	return spi_setup_slave(CONFIG_FSL_PMIC_BUS,
	35	CONFIG_FSL_PMIC_CS,
	36	CONFIG_FSL_PMIC_CLK,
	37	CONFIG_FSL_PMIC_MODE);
	38	}
	39
	40	void pmic_spi_free(struct spi_slave *slave)
	41	{
	42	if (slave)
	43	spi_free_slave(slave);
	44	}
	45
	46	u32 pmic_reg(u32 reg, u32 val, u32 write)
	47	{
	48	u32 pmic_tx, pmic_rx;
2f721d17	49	u32 tmp;
28bb6d34 SB	50
	51	if (!slave) {
	52	slave = pmic_spi_probe();
	53
	54	if (!slave)
	55	return -1;
	56	}
	57
	58	if (reg > 63 \|\| write > 1) {
	59	printf("<reg num> = %d is invalid. Should be less then 63\n",
	60	reg);
	61	return -1;
	62	}
	63
	64	if (spi_claim_bus(slave))
	65	return -1;
	66
	67	pmic_tx = (write << 31) \| (reg << 25) \| (val & 0x00FFFFFF);
	68
2f721d17 SB	69	tmp = cpu_to_be32(pmic_tx);
	70
	71	if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
28bb6d34 SB	72	SPI_XFER_BEGIN \| SPI_XFER_END)) {
	73	spi_release_bus(slave);
	74	return -1;
	75	}
	76
	77	if (write) {
	78	pmic_tx &= ~(1 << 31);
2f721d17 SB	79	tmp = cpu_to_be32(pmic_tx);
2f721d17 SB	80	if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
28bb6d34 SB	81	SPI_XFER_BEGIN \| SPI_XFER_END)) {
	82	spi_release_bus(slave);
	83	return -1;
	84	}
	85	}
	86
	87	spi_release_bus(slave);
2f721d17	88	return cpu_to_be32(pmic_rx);
28bb6d34 SB	89	}
	90
	91	void pmic_reg_write(u32 reg, u32 value)
	92	{
	93	pmic_reg(reg, value, 1);
	94	}
	95
	96	u32 pmic_reg_read(u32 reg)
	97	{
	98	return pmic_reg(reg, 0, 0);
	99	}
	100
	101	void pmic_show_pmic_info(void)
	102	{
	103	u32 rev_id;
	104
	105	rev_id = pmic_reg_read(REG_IDENTIFICATION);
	106	printf("PMIC ID: 0x%08x [Rev: ", rev_id);
	107	switch (rev_id & 0x1F) {
	108	case 0x1:
	109	puts("1.0");
	110	break;
	111	case 0x9:
	112	puts("1.1");
	113	break;
	114	case 0xA:
	115	puts("1.2");
	116	break;
	117	case 0x10:
	118	puts("2.0");
	119	break;
	120	case 0x11:
	121	puts("2.1");
	122	break;
	123	case 0x18:
	124	puts("3.0");
	125	break;
	126	case 0x19:
	127	puts("3.1");
	128	break;
	129	case 0x1A:
	130	puts("3.2");
	131	break;
	132	case 0x2:
	133	puts("3.2A");
	134	break;
	135	case 0x1B:
	136	puts("3.3");
	137	break;
	138	case 0x1D:
	139	puts("3.5");
	140	break;
	141	default:
	142	puts("unknown");
	143	break;
	144	}
	145	puts("]\n");
	146	}
	147
	148	static void pmic_dump(int numregs)
	149	{
	150	u32 val;
	151	int i;
	152
153	pmic_show_pmic_info();
154	for (i = 0; i < numregs; i++) {
155	val = pmic_reg_read(i);
156	if (!(i % 8))
157	printf ("\n0x%02x: ", i);
158	printf("%08x ", val);
159	}
160	puts("\n");
161	}
162
54841ab5	163	int do_pmic(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
28bb6d34 SB	164	{
	165	char *cmd;
	166	int nregs;
	167	u32 val;
	168
	169	/* at least two arguments please */
47e26b1b WD	170	if (argc < 2)
47e26b1b WD	171	return cmd_usage(cmdtp);
28bb6d34 SB	172
	173	cmd = argv[1];
	174	if (strcmp(cmd, "dump") == 0) {
47e26b1b WD	175	if (argc < 3)
	176	return cmd_usage(cmdtp);
	177
28bb6d34 SB	178	nregs = simple_strtoul(argv[2], NULL, 16);
	179	pmic_dump(nregs);
	180	return 0;
	181	}
	182	if (strcmp(cmd, "write") == 0) {
47e26b1b WD	183	if (argc < 4)
	184	return cmd_usage(cmdtp);
	185
28bb6d34 SB	186	nregs = simple_strtoul(argv[2], NULL, 16);
	187	val = simple_strtoul(argv[3], NULL, 16);
	188	pmic_reg_write(nregs, val);
	189	return 0;
	190	}
	191	/* No subcommand found */
	192	return 1;
	193	}
	194
	195	U_BOOT_CMD(
	196	pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
	197	"Freescale PMIC (Atlas)",
	198	"dump [numregs] dump registers\n"
	199	"pmic write <reg> <value> - write register"
	200	);