diff options
Diffstat (limited to 'drivers/video/fbdev/msm/mddi.c')
| -rw-r--r-- | drivers/video/fbdev/msm/mddi.c | 821 |
1 files changed, 0 insertions, 821 deletions
diff --git a/drivers/video/fbdev/msm/mddi.c b/drivers/video/fbdev/msm/mddi.c deleted file mode 100644 index e0f8011a3..000000000 --- a/drivers/video/fbdev/msm/mddi.c +++ /dev/null @@ -1,821 +0,0 @@ -/* - * 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); |