+++ /dev/null
-/*
- * MSM MDDI Transport
- *
- * Copyright (C) 2007 Google Incorporated
- * Copyright (C) 2007 QUALCOMM Incorporated
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/gfp.h>
-#include <linux/spinlock.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/sched.h>
-#include <linux/platform_data/video-msm_fb.h>
-#include "mddi_hw.h"
-
-#define FLAG_DISABLE_HIBERNATION 0x0001
-#define FLAG_HAVE_CAPS 0x0002
-#define FLAG_HAS_VSYNC_IRQ 0x0004
-#define FLAG_HAVE_STATUS 0x0008
-
-#define CMD_GET_CLIENT_CAP 0x0601
-#define CMD_GET_CLIENT_STATUS 0x0602
-
-union mddi_rev {
- unsigned char raw[MDDI_REV_BUFFER_SIZE];
- struct mddi_rev_packet hdr;
- struct mddi_client_status status;
- struct mddi_client_caps caps;
- struct mddi_register_access reg;
-};
-
-struct reg_read_info {
- struct completion done;
- uint32_t reg;
- uint32_t status;
- uint32_t result;
-};
-
-struct mddi_info {
- uint16_t flags;
- uint16_t version;
- char __iomem *base;
- int irq;
- struct clk *clk;
- struct msm_mddi_client_data client_data;
-
- /* buffer for rev encap packets */
- void *rev_data;
- dma_addr_t rev_addr;
- struct mddi_llentry *reg_write_data;
- dma_addr_t reg_write_addr;
- struct mddi_llentry *reg_read_data;
- dma_addr_t reg_read_addr;
- size_t rev_data_curr;
-
- spinlock_t int_lock;
- uint32_t int_enable;
- uint32_t got_int;
- wait_queue_head_t int_wait;
-
- struct mutex reg_write_lock;
- struct mutex reg_read_lock;
- struct reg_read_info *reg_read;
-
- struct mddi_client_caps caps;
- struct mddi_client_status status;
-
- void (*power_client)(struct msm_mddi_client_data *, int);
-
- /* client device published to bind us to the
- * appropriate mddi_client driver
- */
- char client_name[20];
-
- struct platform_device client_pdev;
-};
-
-static void mddi_init_rev_encap(struct mddi_info *mddi);
-
-#define mddi_readl(r) readl(mddi->base + (MDDI_##r))
-#define mddi_writel(v, r) writel((v), mddi->base + (MDDI_##r))
-
-void mddi_activate_link(struct msm_mddi_client_data *cdata)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
-
- mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
-}
-
-static void mddi_handle_link_list_done(struct mddi_info *mddi)
-{
-}
-
-static void mddi_reset_rev_encap_ptr(struct mddi_info *mddi)
-{
- printk(KERN_INFO "mddi: resetting rev ptr\n");
- mddi->rev_data_curr = 0;
- mddi_writel(mddi->rev_addr, REV_PTR);
- mddi_writel(mddi->rev_addr, REV_PTR);
- mddi_writel(MDDI_CMD_FORCE_NEW_REV_PTR, CMD);
-}
-
-static void mddi_handle_rev_data(struct mddi_info *mddi, union mddi_rev *rev)
-{
- int i;
- struct reg_read_info *ri;
-
- if ((rev->hdr.length <= MDDI_REV_BUFFER_SIZE - 2) &&
- (rev->hdr.length >= sizeof(struct mddi_rev_packet) - 2)) {
-
- switch (rev->hdr.type) {
- case TYPE_CLIENT_CAPS:
- memcpy(&mddi->caps, &rev->caps,
- sizeof(struct mddi_client_caps));
- mddi->flags |= FLAG_HAVE_CAPS;
- wake_up(&mddi->int_wait);
- break;
- case TYPE_CLIENT_STATUS:
- memcpy(&mddi->status, &rev->status,
- sizeof(struct mddi_client_status));
- mddi->flags |= FLAG_HAVE_STATUS;
- wake_up(&mddi->int_wait);
- break;
- case TYPE_REGISTER_ACCESS:
- ri = mddi->reg_read;
- if (ri == 0) {
- printk(KERN_INFO "rev: got reg %x = %x without "
- " pending read\n",
- rev->reg.register_address,
- rev->reg.register_data_list);
- break;
- }
- if (ri->reg != rev->reg.register_address) {
- printk(KERN_INFO "rev: got reg %x = %x for "
- "wrong register, expected "
- "%x\n",
- rev->reg.register_address,
- rev->reg.register_data_list, ri->reg);
- break;
- }
- mddi->reg_read = NULL;
- ri->status = 0;
- ri->result = rev->reg.register_data_list;
- complete(&ri->done);
- break;
- default:
- printk(KERN_INFO "rev: unknown reverse packet: "
- "len=%04x type=%04x CURR_REV_PTR=%x\n",
- rev->hdr.length, rev->hdr.type,
- mddi_readl(CURR_REV_PTR));
- for (i = 0; i < rev->hdr.length + 2; i++) {
- if ((i % 16) == 0)
- printk(KERN_INFO "\n");
- printk(KERN_INFO " %02x", rev->raw[i]);
- }
- printk(KERN_INFO "\n");
- mddi_reset_rev_encap_ptr(mddi);
- }
- } else {
- printk(KERN_INFO "bad rev length, %d, CURR_REV_PTR %x\n",
- rev->hdr.length, mddi_readl(CURR_REV_PTR));
- mddi_reset_rev_encap_ptr(mddi);
- }
-}
-
-static void mddi_wait_interrupt(struct mddi_info *mddi, uint32_t intmask);
-
-static void mddi_handle_rev_data_avail(struct mddi_info *mddi)
-{
- uint32_t rev_data_count;
- uint32_t rev_crc_err_count;
- struct reg_read_info *ri;
- size_t prev_offset;
- uint16_t length;
-
- union mddi_rev *crev = mddi->rev_data + mddi->rev_data_curr;
-
- /* clear the interrupt */
- mddi_writel(MDDI_INT_REV_DATA_AVAIL, INT);
- rev_data_count = mddi_readl(REV_PKT_CNT);
- rev_crc_err_count = mddi_readl(REV_CRC_ERR);
- if (rev_data_count > 1)
- printk(KERN_INFO "rev_data_count %d\n", rev_data_count);
-
- if (rev_crc_err_count) {
- printk(KERN_INFO "rev_crc_err_count %d, INT %x\n",
- rev_crc_err_count, mddi_readl(INT));
- ri = mddi->reg_read;
- if (ri == 0) {
- printk(KERN_INFO "rev: got crc error without pending "
- "read\n");
- } else {
- mddi->reg_read = NULL;
- ri->status = -EIO;
- ri->result = -1;
- complete(&ri->done);
- }
- }
-
- if (rev_data_count == 0)
- return;
-
- prev_offset = mddi->rev_data_curr;
-
- length = *((uint8_t *)mddi->rev_data + mddi->rev_data_curr);
- mddi->rev_data_curr++;
- if (mddi->rev_data_curr == MDDI_REV_BUFFER_SIZE)
- mddi->rev_data_curr = 0;
- length += *((uint8_t *)mddi->rev_data + mddi->rev_data_curr) << 8;
- mddi->rev_data_curr += 1 + length;
- if (mddi->rev_data_curr >= MDDI_REV_BUFFER_SIZE)
- mddi->rev_data_curr =
- mddi->rev_data_curr % MDDI_REV_BUFFER_SIZE;
-
- if (length > MDDI_REV_BUFFER_SIZE - 2) {
- printk(KERN_INFO "mddi: rev data length greater than buffer"
- "size\n");
- mddi_reset_rev_encap_ptr(mddi);
- return;
- }
-
- if (prev_offset + 2 + length >= MDDI_REV_BUFFER_SIZE) {
- union mddi_rev tmprev;
- size_t rem = MDDI_REV_BUFFER_SIZE - prev_offset;
- memcpy(&tmprev.raw[0], mddi->rev_data + prev_offset, rem);
- memcpy(&tmprev.raw[rem], mddi->rev_data, 2 + length - rem);
- mddi_handle_rev_data(mddi, &tmprev);
- } else {
- mddi_handle_rev_data(mddi, crev);
- }
-
- if (prev_offset < MDDI_REV_BUFFER_SIZE / 2 &&
- mddi->rev_data_curr >= MDDI_REV_BUFFER_SIZE / 2) {
- mddi_writel(mddi->rev_addr, REV_PTR);
- }
-}
-
-static irqreturn_t mddi_isr(int irq, void *data)
-{
- struct msm_mddi_client_data *cdata = data;
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- uint32_t active, status;
-
- spin_lock(&mddi->int_lock);
-
- active = mddi_readl(INT);
- status = mddi_readl(STAT);
-
- mddi_writel(active, INT);
-
- /* ignore any interrupts we have disabled */
- active &= mddi->int_enable;
-
- mddi->got_int |= active;
- wake_up(&mddi->int_wait);
-
- if (active & MDDI_INT_PRI_LINK_LIST_DONE) {
- mddi->int_enable &= (~MDDI_INT_PRI_LINK_LIST_DONE);
- mddi_handle_link_list_done(mddi);
- }
- if (active & MDDI_INT_REV_DATA_AVAIL)
- mddi_handle_rev_data_avail(mddi);
-
- if (active & ~MDDI_INT_NEED_CLEAR)
- mddi->int_enable &= ~(active & ~MDDI_INT_NEED_CLEAR);
-
- if (active & MDDI_INT_LINK_ACTIVE) {
- mddi->int_enable &= (~MDDI_INT_LINK_ACTIVE);
- mddi->int_enable |= MDDI_INT_IN_HIBERNATION;
- }
-
- if (active & MDDI_INT_IN_HIBERNATION) {
- mddi->int_enable &= (~MDDI_INT_IN_HIBERNATION);
- mddi->int_enable |= MDDI_INT_LINK_ACTIVE;
- }
-
- mddi_writel(mddi->int_enable, INTEN);
- spin_unlock(&mddi->int_lock);
-
- return IRQ_HANDLED;
-}
-
-static long mddi_wait_interrupt_timeout(struct mddi_info *mddi,
- uint32_t intmask, int timeout)
-{
- unsigned long irq_flags;
-
- spin_lock_irqsave(&mddi->int_lock, irq_flags);
- mddi->got_int &= ~intmask;
- mddi->int_enable |= intmask;
- mddi_writel(mddi->int_enable, INTEN);
- spin_unlock_irqrestore(&mddi->int_lock, irq_flags);
- return wait_event_timeout(mddi->int_wait, mddi->got_int & intmask,
- timeout);
-}
-
-static void mddi_wait_interrupt(struct mddi_info *mddi, uint32_t intmask)
-{
- if (mddi_wait_interrupt_timeout(mddi, intmask, HZ/10) == 0)
- printk(KERN_INFO "mddi_wait_interrupt %d, timeout "
- "waiting for %x, INT = %x, STAT = %x gotint = %x\n",
- current->pid, intmask, mddi_readl(INT), mddi_readl(STAT),
- mddi->got_int);
-}
-
-static void mddi_init_rev_encap(struct mddi_info *mddi)
-{
- memset(mddi->rev_data, 0xee, MDDI_REV_BUFFER_SIZE);
- mddi_writel(mddi->rev_addr, REV_PTR);
- mddi_writel(MDDI_CMD_FORCE_NEW_REV_PTR, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-}
-
-void mddi_set_auto_hibernate(struct msm_mddi_client_data *cdata, int on)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- mddi_writel(MDDI_CMD_POWERDOWN, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_IN_HIBERNATION);
- mddi_writel(MDDI_CMD_HIBERNATE | !!on, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-}
-
-
-static uint16_t mddi_init_registers(struct mddi_info *mddi)
-{
- mddi_writel(0x0001, VERSION);
- mddi_writel(MDDI_HOST_BYTES_PER_SUBFRAME, BPS);
- mddi_writel(0x0003, SPM); /* subframes per media */
- mddi_writel(0x0005, TA1_LEN);
- mddi_writel(MDDI_HOST_TA2_LEN, TA2_LEN);
- mddi_writel(0x0096, DRIVE_HI);
- /* 0x32 normal, 0x50 for Toshiba display */
- mddi_writel(0x0050, DRIVE_LO);
- mddi_writel(0x003C, DISP_WAKE); /* wakeup counter */
- mddi_writel(MDDI_HOST_REV_RATE_DIV, REV_RATE_DIV);
-
- mddi_writel(MDDI_REV_BUFFER_SIZE, REV_SIZE);
- mddi_writel(MDDI_MAX_REV_PKT_SIZE, REV_ENCAP_SZ);
-
- /* disable periodic rev encap */
- mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-
- if (mddi_readl(PAD_CTL) == 0) {
- /* If we are turning on band gap, need to wait 5us before
- * turning on the rest of the PAD */
- mddi_writel(0x08000, PAD_CTL);
- udelay(5);
- }
-
- /* Recommendation from PAD hw team */
- mddi_writel(0xa850f, PAD_CTL);
-
-
- /* Need an even number for counts */
- mddi_writel(0x60006, DRIVER_START_CNT);
-
- mddi_set_auto_hibernate(&mddi->client_data, 0);
-
- mddi_writel(MDDI_CMD_DISP_IGNORE, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-
- mddi_init_rev_encap(mddi);
- return mddi_readl(CORE_VER) & 0xffff;
-}
-
-static void mddi_suspend(struct msm_mddi_client_data *cdata)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- /* turn off the client */
- if (mddi->power_client)
- mddi->power_client(&mddi->client_data, 0);
- /* turn off the link */
- mddi_writel(MDDI_CMD_RESET, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- /* turn off the clock */
- clk_disable(mddi->clk);
-}
-
-static void mddi_resume(struct msm_mddi_client_data *cdata)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- mddi_set_auto_hibernate(&mddi->client_data, 0);
- /* turn on the client */
- if (mddi->power_client)
- mddi->power_client(&mddi->client_data, 1);
- /* turn on the clock */
- clk_enable(mddi->clk);
- /* set up the local registers */
- mddi->rev_data_curr = 0;
- mddi_init_registers(mddi);
- mddi_writel(mddi->int_enable, INTEN);
- mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
- mddi_writel(MDDI_CMD_SEND_RTD, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- mddi_set_auto_hibernate(&mddi->client_data, 1);
-}
-
-static int mddi_get_client_caps(struct mddi_info *mddi)
-{
- int i, j;
-
- /* clear any stale interrupts */
- mddi_writel(0xffffffff, INT);
-
- mddi->int_enable = MDDI_INT_LINK_ACTIVE |
- MDDI_INT_IN_HIBERNATION |
- MDDI_INT_PRI_LINK_LIST_DONE |
- MDDI_INT_REV_DATA_AVAIL |
- MDDI_INT_REV_OVERFLOW |
- MDDI_INT_REV_OVERWRITE |
- MDDI_INT_RTD_FAILURE;
- mddi_writel(mddi->int_enable, INTEN);
-
- mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-
- for (j = 0; j < 3; j++) {
- /* the toshiba vga panel does not respond to get
- * caps unless you SEND_RTD, but the first SEND_RTD
- * will fail...
- */
- for (i = 0; i < 4; i++) {
- uint32_t stat;
-
- mddi_writel(MDDI_CMD_SEND_RTD, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- stat = mddi_readl(STAT);
- printk(KERN_INFO "mddi cmd send rtd: int %x, stat %x, "
- "rtd val %x\n", mddi_readl(INT), stat,
- mddi_readl(RTD_VAL));
- if ((stat & MDDI_STAT_RTD_MEAS_FAIL) == 0)
- break;
- msleep(1);
- }
-
- mddi_writel(CMD_GET_CLIENT_CAP, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- wait_event_timeout(mddi->int_wait, mddi->flags & FLAG_HAVE_CAPS,
- HZ / 100);
-
- if (mddi->flags & FLAG_HAVE_CAPS)
- break;
- printk(KERN_INFO "mddi_init, timeout waiting for caps\n");
- }
- return mddi->flags & FLAG_HAVE_CAPS;
-}
-
-/* link must be active when this is called */
-int mddi_check_status(struct mddi_info *mddi)
-{
- int ret = -1, retry = 3;
- mutex_lock(&mddi->reg_read_lock);
- mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 1, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
-
- do {
- mddi->flags &= ~FLAG_HAVE_STATUS;
- mddi_writel(CMD_GET_CLIENT_STATUS, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- wait_event_timeout(mddi->int_wait,
- mddi->flags & FLAG_HAVE_STATUS,
- HZ / 100);
-
- if (mddi->flags & FLAG_HAVE_STATUS) {
- if (mddi->status.crc_error_count)
- printk(KERN_INFO "mddi status: crc_error "
- "count: %d\n",
- mddi->status.crc_error_count);
- else
- ret = 0;
- break;
- } else
- printk(KERN_INFO "mddi status: failed to get client "
- "status\n");
- mddi_writel(MDDI_CMD_SEND_RTD, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- } while (--retry);
-
- mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 0, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- mutex_unlock(&mddi->reg_read_lock);
- return ret;
-}
-
-
-void mddi_remote_write(struct msm_mddi_client_data *cdata, uint32_t val,
- uint32_t reg)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- struct mddi_llentry *ll;
- struct mddi_register_access *ra;
-
- mutex_lock(&mddi->reg_write_lock);
-
- ll = mddi->reg_write_data;
-
- ra = &(ll->u.r);
- ra->length = 14 + 4;
- ra->type = TYPE_REGISTER_ACCESS;
- ra->client_id = 0;
- ra->read_write_info = MDDI_WRITE | 1;
- ra->crc16 = 0;
-
- ra->register_address = reg;
- ra->register_data_list = val;
-
- ll->flags = 1;
- ll->header_count = 14;
- ll->data_count = 4;
- ll->data = mddi->reg_write_addr + offsetof(struct mddi_llentry,
- u.r.register_data_list);
- ll->next = 0;
- ll->reserved = 0;
-
- mddi_writel(mddi->reg_write_addr, PRI_PTR);
-
- mddi_wait_interrupt(mddi, MDDI_INT_PRI_LINK_LIST_DONE);
- mutex_unlock(&mddi->reg_write_lock);
-}
-
-uint32_t mddi_remote_read(struct msm_mddi_client_data *cdata, uint32_t reg)
-{
- struct mddi_info *mddi = container_of(cdata, struct mddi_info,
- client_data);
- struct mddi_llentry *ll;
- struct mddi_register_access *ra;
- struct reg_read_info ri;
- unsigned s;
- int retry_count = 2;
- unsigned long irq_flags;
-
- mutex_lock(&mddi->reg_read_lock);
-
- ll = mddi->reg_read_data;
-
- ra = &(ll->u.r);
- ra->length = 14;
- ra->type = TYPE_REGISTER_ACCESS;
- ra->client_id = 0;
- ra->read_write_info = MDDI_READ | 1;
- ra->crc16 = 0;
-
- ra->register_address = reg;
-
- ll->flags = 0x11;
- ll->header_count = 14;
- ll->data_count = 0;
- ll->data = 0;
- ll->next = 0;
- ll->reserved = 0;
-
- s = mddi_readl(STAT);
-
- ri.reg = reg;
- ri.status = -1;
-
- do {
- init_completion(&ri.done);
- mddi->reg_read = &ri;
- mddi_writel(mddi->reg_read_addr, PRI_PTR);
-
- mddi_wait_interrupt(mddi, MDDI_INT_PRI_LINK_LIST_DONE);
-
- /* Enable Periodic Reverse Encapsulation. */
- mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 1, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- if (wait_for_completion_timeout(&ri.done, HZ/10) == 0 &&
- !ri.done.done) {
- printk(KERN_INFO "mddi_remote_read(%x) timeout "
- "(%d %d %d)\n",
- reg, ri.status, ri.result, ri.done.done);
- spin_lock_irqsave(&mddi->int_lock, irq_flags);
- mddi->reg_read = NULL;
- spin_unlock_irqrestore(&mddi->int_lock, irq_flags);
- ri.status = -1;
- ri.result = -1;
- }
- if (ri.status == 0)
- break;
-
- mddi_writel(MDDI_CMD_SEND_RTD, CMD);
- mddi_writel(MDDI_CMD_LINK_ACTIVE, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- printk(KERN_INFO "mddi_remote_read: failed, sent "
- "MDDI_CMD_SEND_RTD: int %x, stat %x, rtd val %x "
- "curr_rev_ptr %x\n", mddi_readl(INT), mddi_readl(STAT),
- mddi_readl(RTD_VAL), mddi_readl(CURR_REV_PTR));
- } while (retry_count-- > 0);
- /* Disable Periodic Reverse Encapsulation. */
- mddi_writel(MDDI_CMD_PERIODIC_REV_ENCAP | 0, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- mddi->reg_read = NULL;
- mutex_unlock(&mddi->reg_read_lock);
- return ri.result;
-}
-
-static struct mddi_info mddi_info[2];
-
-static int mddi_clk_setup(struct platform_device *pdev, struct mddi_info *mddi,
- unsigned long clk_rate)
-{
- int ret;
-
- /* set up the clocks */
- mddi->clk = clk_get(&pdev->dev, "mddi_clk");
- if (IS_ERR(mddi->clk)) {
- printk(KERN_INFO "mddi: failed to get clock\n");
- return PTR_ERR(mddi->clk);
- }
- ret = clk_enable(mddi->clk);
- if (ret)
- goto fail;
- ret = clk_set_rate(mddi->clk, clk_rate);
- if (ret)
- goto fail;
- return 0;
-
-fail:
- clk_put(mddi->clk);
- return ret;
-}
-
-static int __init mddi_rev_data_setup(struct mddi_info *mddi)
-{
- void *dma;
- dma_addr_t dma_addr;
-
- /* set up dma buffer */
- dma = dma_alloc_coherent(NULL, 0x1000, &dma_addr, GFP_KERNEL);
- if (dma == 0)
- return -ENOMEM;
- mddi->rev_data = dma;
- mddi->rev_data_curr = 0;
- mddi->rev_addr = dma_addr;
- mddi->reg_write_data = dma + MDDI_REV_BUFFER_SIZE;
- mddi->reg_write_addr = dma_addr + MDDI_REV_BUFFER_SIZE;
- mddi->reg_read_data = mddi->reg_write_data + 1;
- mddi->reg_read_addr = mddi->reg_write_addr +
- sizeof(*mddi->reg_write_data);
- return 0;
-}
-
-static int mddi_probe(struct platform_device *pdev)
-{
- struct msm_mddi_platform_data *pdata = pdev->dev.platform_data;
- struct mddi_info *mddi = &mddi_info[pdev->id];
- struct resource *resource;
- int ret, i;
-
- resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!resource) {
- printk(KERN_ERR "mddi: no associated mem resource!\n");
- return -ENOMEM;
- }
- mddi->base = ioremap(resource->start, resource_size(resource));
- if (!mddi->base) {
- printk(KERN_ERR "mddi: failed to remap base!\n");
- ret = -EINVAL;
- goto error_ioremap;
- }
- resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!resource) {
- printk(KERN_ERR "mddi: no associated irq resource!\n");
- ret = -EINVAL;
- goto error_get_irq_resource;
- }
- mddi->irq = resource->start;
- printk(KERN_INFO "mddi: init() base=0x%p irq=%d\n", mddi->base,
- mddi->irq);
- mddi->power_client = pdata->power_client;
-
- mutex_init(&mddi->reg_write_lock);
- mutex_init(&mddi->reg_read_lock);
- spin_lock_init(&mddi->int_lock);
- init_waitqueue_head(&mddi->int_wait);
-
- ret = mddi_clk_setup(pdev, mddi, pdata->clk_rate);
- if (ret) {
- printk(KERN_ERR "mddi: failed to setup clock!\n");
- goto error_clk_setup;
- }
-
- ret = mddi_rev_data_setup(mddi);
- if (ret) {
- printk(KERN_ERR "mddi: failed to setup rev data!\n");
- goto error_rev_data;
- }
-
- mddi->int_enable = 0;
- mddi_writel(mddi->int_enable, INTEN);
- ret = request_irq(mddi->irq, mddi_isr, 0, "mddi",
- &mddi->client_data);
- if (ret) {
- printk(KERN_ERR "mddi: failed to request enable irq!\n");
- goto error_request_irq;
- }
-
- /* turn on the mddi client bridge chip */
- if (mddi->power_client)
- mddi->power_client(&mddi->client_data, 1);
-
- /* initialize the mddi registers */
- mddi_set_auto_hibernate(&mddi->client_data, 0);
- mddi_writel(MDDI_CMD_RESET, CMD);
- mddi_wait_interrupt(mddi, MDDI_INT_NO_CMD_PKTS_PEND);
- mddi->version = mddi_init_registers(mddi);
- if (mddi->version < 0x20) {
- printk(KERN_ERR "mddi: unsupported version 0x%x\n",
- mddi->version);
- ret = -ENODEV;
- goto error_mddi_version;
- }
-
- /* read the capabilities off the client */
- if (!mddi_get_client_caps(mddi)) {
- printk(KERN_INFO "mddi: no client found\n");
- /* power down the panel */
- mddi_writel(MDDI_CMD_POWERDOWN, CMD);
- printk(KERN_INFO "mddi powerdown: stat %x\n", mddi_readl(STAT));
- msleep(100);
- printk(KERN_INFO "mddi powerdown: stat %x\n", mddi_readl(STAT));
- return 0;
- }
- mddi_set_auto_hibernate(&mddi->client_data, 1);
-
- if (mddi->caps.Mfr_Name == 0 && mddi->caps.Product_Code == 0)
- pdata->fixup(&mddi->caps.Mfr_Name, &mddi->caps.Product_Code);
-
- mddi->client_pdev.id = 0;
- for (i = 0; i < pdata->num_clients; i++) {
- if (pdata->client_platform_data[i].product_id ==
- (mddi->caps.Mfr_Name << 16 | mddi->caps.Product_Code)) {
- mddi->client_data.private_client_data =
- pdata->client_platform_data[i].client_data;
- mddi->client_pdev.name =
- pdata->client_platform_data[i].name;
- mddi->client_pdev.id =
- pdata->client_platform_data[i].id;
- /* XXX: possibly set clock */
- break;
- }
- }
-
- if (i >= pdata->num_clients)
- mddi->client_pdev.name = "mddi_c_dummy";
- printk(KERN_INFO "mddi: registering panel %s\n",
- mddi->client_pdev.name);
-
- mddi->client_data.suspend = mddi_suspend;
- mddi->client_data.resume = mddi_resume;
- mddi->client_data.activate_link = mddi_activate_link;
- mddi->client_data.remote_write = mddi_remote_write;
- mddi->client_data.remote_read = mddi_remote_read;
- mddi->client_data.auto_hibernate = mddi_set_auto_hibernate;
- mddi->client_data.fb_resource = pdata->fb_resource;
- if (pdev->id == 0)
- mddi->client_data.interface_type = MSM_MDDI_PMDH_INTERFACE;
- else if (pdev->id == 1)
- mddi->client_data.interface_type = MSM_MDDI_EMDH_INTERFACE;
- else {
- printk(KERN_ERR "mddi: can not determine interface %d!\n",
- pdev->id);
- ret = -EINVAL;
- goto error_mddi_interface;
- }
-
- mddi->client_pdev.dev.platform_data = &mddi->client_data;
- printk(KERN_INFO "mddi: publish: %s\n", mddi->client_name);
- platform_device_register(&mddi->client_pdev);
- return 0;
-
-error_mddi_interface:
-error_mddi_version:
- free_irq(mddi->irq, 0);
-error_request_irq:
- dma_free_coherent(NULL, 0x1000, mddi->rev_data, mddi->rev_addr);
-error_rev_data:
-error_clk_setup:
-error_get_irq_resource:
- iounmap(mddi->base);
-error_ioremap:
-
- printk(KERN_INFO "mddi: mddi_init() failed (%d)\n", ret);
- return ret;
-}
-
-
-static struct platform_driver mddi_driver = {
- .probe = mddi_probe,
- .driver = { .name = "msm_mddi" },
-};
-
-static int __init _mddi_init(void)
-{
- return platform_driver_register(&mddi_driver);
-}
-
-module_init(_mddi_init);
Code Review / kvmfornfv.git / blobdiff