aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd/db5500-prcmu.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mfd/db5500-prcmu.c')
-rw-r--r--drivers/mfd/db5500-prcmu.c451
1 files changed, 0 insertions, 451 deletions
diff --git a/drivers/mfd/db5500-prcmu.c b/drivers/mfd/db5500-prcmu.c
deleted file mode 100644
index bb115b2f04e..00000000000
--- a/drivers/mfd/db5500-prcmu.c
+++ /dev/null
@@ -1,451 +0,0 @@
-/*
- * Copyright (C) ST-Ericsson SA 2010
- *
- * License Terms: GNU General Public License v2
- * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
- *
- * U5500 PRCM Unit interface driver
- */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/mutex.h>
-#include <linux/completion.h>
-#include <linux/irq.h>
-#include <linux/jiffies.h>
-#include <linux/bitops.h>
-#include <linux/interrupt.h>
-#include <linux/mfd/dbx500-prcmu.h>
-#include <mach/hardware.h>
-#include <mach/irqs.h>
-#include <mach/db5500-regs.h>
-#include "dbx500-prcmu-regs.h"
-
-#define _PRCM_MB_HEADER (tcdm_base + 0xFE8)
-#define PRCM_REQ_MB0_HEADER (_PRCM_MB_HEADER + 0x0)
-#define PRCM_REQ_MB1_HEADER (_PRCM_MB_HEADER + 0x1)
-#define PRCM_REQ_MB2_HEADER (_PRCM_MB_HEADER + 0x2)
-#define PRCM_REQ_MB3_HEADER (_PRCM_MB_HEADER + 0x3)
-#define PRCM_REQ_MB4_HEADER (_PRCM_MB_HEADER + 0x4)
-#define PRCM_REQ_MB5_HEADER (_PRCM_MB_HEADER + 0x5)
-#define PRCM_REQ_MB6_HEADER (_PRCM_MB_HEADER + 0x6)
-#define PRCM_REQ_MB7_HEADER (_PRCM_MB_HEADER + 0x7)
-#define PRCM_ACK_MB0_HEADER (_PRCM_MB_HEADER + 0x8)
-#define PRCM_ACK_MB1_HEADER (_PRCM_MB_HEADER + 0x9)
-#define PRCM_ACK_MB2_HEADER (_PRCM_MB_HEADER + 0xa)
-#define PRCM_ACK_MB3_HEADER (_PRCM_MB_HEADER + 0xb)
-#define PRCM_ACK_MB4_HEADER (_PRCM_MB_HEADER + 0xc)
-#define PRCM_ACK_MB5_HEADER (_PRCM_MB_HEADER + 0xd)
-#define PRCM_ACK_MB6_HEADER (_PRCM_MB_HEADER + 0xe)
-#define PRCM_ACK_MB7_HEADER (_PRCM_MB_HEADER + 0xf)
-
-/* Req Mailboxes */
-#define PRCM_REQ_MB0 (tcdm_base + 0xFD8)
-#define PRCM_REQ_MB1 (tcdm_base + 0xFCC)
-#define PRCM_REQ_MB2 (tcdm_base + 0xFC4)
-#define PRCM_REQ_MB3 (tcdm_base + 0xFC0)
-#define PRCM_REQ_MB4 (tcdm_base + 0xF98)
-#define PRCM_REQ_MB5 (tcdm_base + 0xF90)
-#define PRCM_REQ_MB6 (tcdm_base + 0xF8C)
-#define PRCM_REQ_MB7 (tcdm_base + 0xF84)
-
-/* Ack Mailboxes */
-#define PRCM_ACK_MB0 (tcdm_base + 0xF38)
-#define PRCM_ACK_MB1 (tcdm_base + 0xF30)
-#define PRCM_ACK_MB2 (tcdm_base + 0xF24)
-#define PRCM_ACK_MB3 (tcdm_base + 0xF20)
-#define PRCM_ACK_MB4 (tcdm_base + 0xF1C)
-#define PRCM_ACK_MB5 (tcdm_base + 0xF14)
-#define PRCM_ACK_MB6 (tcdm_base + 0xF0C)
-#define PRCM_ACK_MB7 (tcdm_base + 0xF08)
-
-enum mb_return_code {
- RC_SUCCESS,
- RC_FAIL,
-};
-
-/* Mailbox 0 headers. */
-enum mb0_header {
- /* request */
- RMB0H_PWR_STATE_TRANS = 1,
- RMB0H_WAKE_UP_CFG,
- RMB0H_RD_WAKE_UP_ACK,
- /* acknowledge */
- AMB0H_WAKE_UP = 1,
-};
-
-/* Mailbox 5 headers. */
-enum mb5_header {
- MB5H_I2C_WRITE = 1,
- MB5H_I2C_READ,
-};
-
-/* Request mailbox 5 fields. */
-#define PRCM_REQ_MB5_I2C_SLAVE (PRCM_REQ_MB5 + 0)
-#define PRCM_REQ_MB5_I2C_REG (PRCM_REQ_MB5 + 1)
-#define PRCM_REQ_MB5_I2C_SIZE (PRCM_REQ_MB5 + 2)
-#define PRCM_REQ_MB5_I2C_DATA (PRCM_REQ_MB5 + 4)
-
-/* Acknowledge mailbox 5 fields. */
-#define PRCM_ACK_MB5_RETURN_CODE (PRCM_ACK_MB5 + 0)
-#define PRCM_ACK_MB5_I2C_DATA (PRCM_ACK_MB5 + 4)
-
-#define NUM_MB 8
-#define MBOX_BIT BIT
-#define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
-
-/*
-* Used by MCDE to setup all necessary PRCMU registers
-*/
-#define PRCMU_RESET_DSIPLL 0x00004000
-#define PRCMU_UNCLAMP_DSIPLL 0x00400800
-
-/* HDMI CLK MGT PLLSW=001 (PLLSOC0), PLLDIV=0x8, = 50 Mhz*/
-#define PRCMU_DSI_CLOCK_SETTING 0x00000128
-/* TVCLK_MGT PLLSW=001 (PLLSOC0) PLLDIV=0x13, = 19.05 MHZ */
-#define PRCMU_DSI_LP_CLOCK_SETTING 0x00000135
-#define PRCMU_PLLDSI_FREQ_SETTING 0x00020121
-#define PRCMU_DSI_PLLOUT_SEL_SETTING 0x00000002
-#define PRCMU_ENABLE_ESCAPE_CLOCK_DIV 0x03000201
-#define PRCMU_DISABLE_ESCAPE_CLOCK_DIV 0x00000101
-
-#define PRCMU_ENABLE_PLLDSI 0x00000001
-#define PRCMU_DISABLE_PLLDSI 0x00000000
-
-#define PRCMU_DSI_RESET_SW 0x00000003
-#define PRCMU_RESOUTN0_PIN 0x00000001
-#define PRCMU_RESOUTN1_PIN 0x00000002
-#define PRCMU_RESOUTN2_PIN 0x00000004
-
-#define PRCMU_PLLDSI_LOCKP_LOCKED 0x3
-
-/*
- * mb0_transfer - state needed for mailbox 0 communication.
- * @lock: The transaction lock.
- */
-static struct {
- spinlock_t lock;
-} mb0_transfer;
-
-/*
- * mb5_transfer - state needed for mailbox 5 communication.
- * @lock: The transaction lock.
- * @work: The transaction completion structure.
- * @ack: Reply ("acknowledge") data.
- */
-static struct {
- struct mutex lock;
- struct completion work;
- struct {
- u8 header;
- u8 status;
- u8 value[4];
- } ack;
-} mb5_transfer;
-
-/* PRCMU TCDM base IO address. */
-static __iomem void *tcdm_base;
-
-/**
- * db5500_prcmu_abb_read() - Read register value(s) from the ABB.
- * @slave: The I2C slave address.
- * @reg: The (start) register address.
- * @value: The read out value(s).
- * @size: The number of registers to read.
- *
- * Reads register value(s) from the ABB.
- * @size has to be <= 4.
- */
-int db5500_prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
-{
- int r;
-
- if ((size < 1) || (4 < size))
- return -EINVAL;
-
- mutex_lock(&mb5_transfer.lock);
-
- while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
- cpu_relax();
- writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
- writeb(reg, PRCM_REQ_MB5_I2C_REG);
- writeb(size, PRCM_REQ_MB5_I2C_SIZE);
- writeb(MB5H_I2C_READ, PRCM_REQ_MB5_HEADER);
-
- writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
- wait_for_completion(&mb5_transfer.work);
-
- r = 0;
- if ((mb5_transfer.ack.header == MB5H_I2C_READ) &&
- (mb5_transfer.ack.status == RC_SUCCESS))
- memcpy(value, mb5_transfer.ack.value, (size_t)size);
- else
- r = -EIO;
-
- mutex_unlock(&mb5_transfer.lock);
-
- return r;
-}
-
-/**
- * db5500_prcmu_abb_write() - Write register value(s) to the ABB.
- * @slave: The I2C slave address.
- * @reg: The (start) register address.
- * @value: The value(s) to write.
- * @size: The number of registers to write.
- *
- * Writes register value(s) to the ABB.
- * @size has to be <= 4.
- */
-int db5500_prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
-{
- int r;
-
- if ((size < 1) || (4 < size))
- return -EINVAL;
-
- mutex_lock(&mb5_transfer.lock);
-
- while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
- cpu_relax();
- writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
- writeb(reg, PRCM_REQ_MB5_I2C_REG);
- writeb(size, PRCM_REQ_MB5_I2C_SIZE);
- memcpy_toio(PRCM_REQ_MB5_I2C_DATA, value, size);
- writeb(MB5H_I2C_WRITE, PRCM_REQ_MB5_HEADER);
-
- writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
- wait_for_completion(&mb5_transfer.work);
-
- if ((mb5_transfer.ack.header == MB5H_I2C_WRITE) &&
- (mb5_transfer.ack.status == RC_SUCCESS))
- r = 0;
- else
- r = -EIO;
-
- mutex_unlock(&mb5_transfer.lock);
-
- return r;
-}
-
-int db5500_prcmu_enable_dsipll(void)
-{
- int i;
-
- /* Enable DSIPLL_RESETN resets */
- writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_CLR);
- /* Unclamp DSIPLL in/out */
- writel(PRCMU_UNCLAMP_DSIPLL, PRCM_MMIP_LS_CLAMP_CLR);
- /* Set DSI PLL FREQ */
- writel(PRCMU_PLLDSI_FREQ_SETTING, PRCM_PLLDSI_FREQ);
- writel(PRCMU_DSI_PLLOUT_SEL_SETTING,
- PRCM_DSI_PLLOUT_SEL);
- /* Enable Escape clocks */
- writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
-
- /* Start DSI PLL */
- writel(PRCMU_ENABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
- /* Reset DSI PLL */
- writel(PRCMU_DSI_RESET_SW, PRCM_DSI_SW_RESET);
- for (i = 0; i < 10; i++) {
- if ((readl(PRCM_PLLDSI_LOCKP) &
- PRCMU_PLLDSI_LOCKP_LOCKED) == PRCMU_PLLDSI_LOCKP_LOCKED)
- break;
- udelay(100);
- }
- /* Release DSIPLL_RESETN */
- writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_SET);
- return 0;
-}
-
-int db5500_prcmu_disable_dsipll(void)
-{
- /* Disable dsi pll */
- writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
- /* Disable escapeclock */
- writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
- return 0;
-}
-
-int db5500_prcmu_set_display_clocks(void)
-{
- /* HDMI and TVCLK Should be handled somewhere else */
- /* PLLDIV=8, PLLSW=2, CLKEN=1 */
- writel(PRCMU_DSI_CLOCK_SETTING, PRCM_HDMICLK_MGT);
- /* PLLDIV=14, PLLSW=2, CLKEN=1 */
- writel(PRCMU_DSI_LP_CLOCK_SETTING, PRCM_TVCLK_MGT);
- return 0;
-}
-
-static void ack_dbb_wakeup(void)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&mb0_transfer.lock, flags);
-
- while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
- cpu_relax();
-
- writeb(RMB0H_RD_WAKE_UP_ACK, PRCM_REQ_MB0_HEADER);
- writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
-
- spin_unlock_irqrestore(&mb0_transfer.lock, flags);
-}
-
-static inline void print_unknown_header_warning(u8 n, u8 header)
-{
- pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
- header, n);
-}
-
-static bool read_mailbox_0(void)
-{
- bool r;
- u8 header;
-
- header = readb(PRCM_ACK_MB0_HEADER);
- switch (header) {
- case AMB0H_WAKE_UP:
- r = true;
- break;
- default:
- print_unknown_header_warning(0, header);
- r = false;
- break;
- }
- writel(MBOX_BIT(0), PRCM_ARM_IT1_CLR);
- return r;
-}
-
-static bool read_mailbox_1(void)
-{
- writel(MBOX_BIT(1), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_2(void)
-{
- writel(MBOX_BIT(2), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_3(void)
-{
- writel(MBOX_BIT(3), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_4(void)
-{
- writel(MBOX_BIT(4), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_5(void)
-{
- u8 header;
-
- header = readb(PRCM_ACK_MB5_HEADER);
- switch (header) {
- case MB5H_I2C_READ:
- memcpy_fromio(mb5_transfer.ack.value, PRCM_ACK_MB5_I2C_DATA, 4);
- case MB5H_I2C_WRITE:
- mb5_transfer.ack.header = header;
- mb5_transfer.ack.status = readb(PRCM_ACK_MB5_RETURN_CODE);
- complete(&mb5_transfer.work);
- break;
- default:
- print_unknown_header_warning(5, header);
- break;
- }
- writel(MBOX_BIT(5), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_6(void)
-{
- writel(MBOX_BIT(6), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool read_mailbox_7(void)
-{
- writel(MBOX_BIT(7), PRCM_ARM_IT1_CLR);
- return false;
-}
-
-static bool (* const read_mailbox[NUM_MB])(void) = {
- read_mailbox_0,
- read_mailbox_1,
- read_mailbox_2,
- read_mailbox_3,
- read_mailbox_4,
- read_mailbox_5,
- read_mailbox_6,
- read_mailbox_7
-};
-
-static irqreturn_t prcmu_irq_handler(int irq, void *data)
-{
- u32 bits;
- u8 n;
- irqreturn_t r;
-
- bits = (readl(PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
- if (unlikely(!bits))
- return IRQ_NONE;
-
- r = IRQ_HANDLED;
- for (n = 0; bits; n++) {
- if (bits & MBOX_BIT(n)) {
- bits -= MBOX_BIT(n);
- if (read_mailbox[n]())
- r = IRQ_WAKE_THREAD;
- }
- }
- return r;
-}
-
-static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
-{
- ack_dbb_wakeup();
- return IRQ_HANDLED;
-}
-
-void __init db5500_prcmu_early_init(void)
-{
- tcdm_base = __io_address(U5500_PRCMU_TCDM_BASE);
- spin_lock_init(&mb0_transfer.lock);
- mutex_init(&mb5_transfer.lock);
- init_completion(&mb5_transfer.work);
-}
-
-/**
- * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
- *
- */
-int __init db5500_prcmu_init(void)
-{
- int r = 0;
-
- if (ux500_is_svp() || !cpu_is_u5500())
- return -ENODEV;
-
- /* Clean up the mailbox interrupts after pre-kernel code. */
- writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLR);
-
- r = request_threaded_irq(IRQ_DB5500_PRCMU1, prcmu_irq_handler,
- prcmu_irq_thread_fn, 0, "prcmu", NULL);
- if (r < 0) {
- pr_err("prcmu: Failed to allocate IRQ_DB5500_PRCMU1.\n");
- return -EBUSY;
- }
- return 0;
-}
-
-arch_initcall(db5500_prcmu_init);