From 37162ccfcde5eadef9635a14219df25aae5456e7 Mon Sep 17 00:00:00 2001 From: Koen Kooi Date: Sun, 12 Aug 2007 08:29:28 +0000 Subject: linux-2.6.18: add avr32 patches, courtes Stelios Koroneos --- .../linux/linux-2.6.18/atmel-mci-debugfs.patch | 278 +++++++++++++++++++++ 1 file changed, 278 insertions(+) create mode 100644 packages/linux/linux-2.6.18/atmel-mci-debugfs.patch (limited to 'packages/linux/linux-2.6.18/atmel-mci-debugfs.patch') diff --git a/packages/linux/linux-2.6.18/atmel-mci-debugfs.patch b/packages/linux/linux-2.6.18/atmel-mci-debugfs.patch new file mode 100644 index 0000000000..4570bd8e93 --- /dev/null +++ b/packages/linux/linux-2.6.18/atmel-mci-debugfs.patch @@ -0,0 +1,278 @@ +From nobody Mon Sep 17 00:00:00 2001 +From: Haavard Skinnemoen +Date: Sun, 14 Jan 2007 19:07:06 +0100 +Subject: [ATMEL MCI] Add debugfs support + +Export some of the atmel-mci driver state through debugfs. More +specifically: + * The MCI hardware registers + * The request currently being processed + * Pending and processed event masks + +Signed-off-by: Haavard Skinnemoen +--- + drivers/mmc/atmel-mci.c | 230 ++++++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 230 insertions(+) + +Index: linux-2.6.18-avr32/drivers/mmc/atmel-mci.c +=================================================================== +--- linux-2.6.18-avr32.orig/drivers/mmc/atmel-mci.c 2007-01-15 15:35:45.000000000 +0100 ++++ linux-2.6.18-avr32/drivers/mmc/atmel-mci.c 2007-01-15 15:38:05.000000000 +0100 +@@ -79,6 +79,14 @@ struct atmel_mci { + struct clk *mck; + struct mmci_platform_data *board; + struct platform_device *pdev; ++ ++#ifdef CONFIG_DEBUG_FS ++ struct dentry *debugfs_root; ++ struct dentry *debugfs_regs; ++ struct dentry *debugfs_req; ++ struct dentry *debugfs_pending_events; ++ struct dentry *debugfs_completed_events; ++#endif + }; + + /* Those printks take an awful lot of time... */ +@@ -90,6 +98,224 @@ static unsigned int fmax = 1000000U; + module_param(fmax, uint, 0444); + MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock"); + ++#ifdef CONFIG_DEBUG_FS ++#include ++ ++#define DBG_REQ_BUF_SIZE (4096 - sizeof(unsigned int)) ++ ++struct req_dbg_data { ++ unsigned int nbytes; ++ char str[DBG_REQ_BUF_SIZE]; ++}; ++ ++static int req_dbg_open(struct inode *inode, struct file *file) ++{ ++ struct atmel_mci *host; ++ struct mmc_request *mrq; ++ struct mmc_command *cmd, *stop; ++ struct mmc_data *data; ++ struct req_dbg_data *priv; ++ char *str; ++ unsigned long n = 0; ++ ++ priv = kzalloc(DBG_REQ_BUF_SIZE, GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ str = priv->str; ++ ++ mutex_lock(&inode->i_mutex); ++ host = inode->u.generic_ip; ++ ++ spin_lock_irq(&host->mmc->lock); ++ mrq = host->mrq; ++ if (mrq) { ++ cmd = mrq->cmd; ++ data = mrq->data; ++ stop = mrq->stop; ++ n = snprintf(str, DBG_REQ_BUF_SIZE, ++ "CMD%u(0x%x) %x %x %x %x %x (err %u)\n", ++ cmd->opcode, cmd->arg, cmd->flags, ++ cmd->resp[0], cmd->resp[1], cmd->resp[2], ++ cmd->resp[3], cmd->error); ++ if (n < DBG_REQ_BUF_SIZE && data) ++ n += snprintf(str + n, DBG_REQ_BUF_SIZE - n, ++ "DATA %u * %u (%u) %x (err %u)\n", ++ data->blocks, data->blksz, ++ data->bytes_xfered, data->flags, ++ data->error); ++ if (n < DBG_REQ_BUF_SIZE && stop) ++ n += snprintf(str + n, DBG_REQ_BUF_SIZE - n, ++ "CMD%u(0x%x) %x %x %x %x %x (err %u)\n", ++ stop->opcode, stop->arg, stop->flags, ++ stop->resp[0], stop->resp[1], ++ stop->resp[2], stop->resp[3], ++ stop->error); ++ } ++ spin_unlock_irq(&host->mmc->lock); ++ mutex_unlock(&inode->i_mutex); ++ ++ priv->nbytes = min(n, DBG_REQ_BUF_SIZE); ++ file->private_data = priv; ++ ++ return 0; ++} ++ ++static int req_dbg_read(struct file *file, char __user *buf, ++ size_t nbytes, loff_t *ppos) ++{ ++ struct req_dbg_data *priv = file->private_data; ++ ++ return simple_read_from_buffer(buf, nbytes, ppos, ++ priv->str, priv->nbytes); ++} ++ ++static int req_dbg_release(struct inode *inode, struct file *file) ++{ ++ kfree(file->private_data); ++ return 0; ++} ++ ++static const struct file_operations req_dbg_fops = { ++ .owner = THIS_MODULE, ++ .open = req_dbg_open, ++ .llseek = no_llseek, ++ .read = req_dbg_read, ++ .release = req_dbg_release, ++}; ++ ++static int regs_dbg_open(struct inode *inode, struct file *file) ++{ ++ struct atmel_mci *host; ++ unsigned int i; ++ u32 *data; ++ int ret = -ENOMEM; ++ ++ mutex_lock(&inode->i_mutex); ++ host = inode->u.generic_ip; ++ data = kmalloc(inode->i_size, GFP_KERNEL); ++ if (!data) ++ goto out; ++ ++ spin_lock_irq(&host->mmc->lock); ++ for (i = 0; i < inode->i_size / 4; i++) ++ data[i] = __raw_readl(host->regs + i * 4); ++ spin_unlock_irq(&host->mmc->lock); ++ ++ file->private_data = data; ++ ret = 0; ++ ++out: ++ mutex_unlock(&inode->i_mutex); ++ ++ return ret; ++} ++ ++static ssize_t regs_dbg_read(struct file *file, char __user *buf, ++ size_t nbytes, loff_t *ppos) ++{ ++ struct inode *inode = file->f_dentry->d_inode; ++ int ret; ++ ++ mutex_lock(&inode->i_mutex); ++ ret = simple_read_from_buffer(buf, nbytes, ppos, ++ file->private_data, ++ file->f_dentry->d_inode->i_size); ++ mutex_unlock(&inode->i_mutex); ++ ++ return ret; ++} ++ ++static int regs_dbg_release(struct inode *inode, struct file *file) ++{ ++ kfree(file->private_data); ++ return 0; ++} ++ ++static const struct file_operations regs_dbg_fops = { ++ .owner = THIS_MODULE, ++ .open = regs_dbg_open, ++ .llseek = generic_file_llseek, ++ .read = regs_dbg_read, ++ .release = regs_dbg_release, ++}; ++ ++static void atmci_init_debugfs(struct atmel_mci *host) ++{ ++ struct mmc_host *mmc; ++ struct dentry *root, *regs; ++ struct resource *res; ++ ++ mmc = host->mmc; ++ root = debugfs_create_dir(mmc_hostname(mmc), NULL); ++ if (IS_ERR(root) || !root) ++ goto err_root; ++ host->debugfs_root = root; ++ ++ regs = debugfs_create_file("regs", 0400, root, host, ®s_dbg_fops); ++ if (!regs) ++ goto err_regs; ++ ++ res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); ++ regs->d_inode->i_size = res->end - res->start + 1; ++ host->debugfs_regs = regs; ++ ++ host->debugfs_req = debugfs_create_file("req", 0400, root, ++ host, &req_dbg_fops); ++ if (!host->debugfs_req) ++ goto err_req; ++ ++ host->debugfs_pending_events ++ = debugfs_create_u32("pending_events", 0400, root, ++ (u32 *)&host->pending_events); ++ if (!host->debugfs_pending_events) ++ goto err_pending_events; ++ ++ host->debugfs_completed_events ++ = debugfs_create_u32("completed_events", 0400, root, ++ (u32 *)&host->completed_events); ++ if (!host->debugfs_completed_events) ++ goto err_completed_events; ++ ++ return; ++ ++err_completed_events: ++ debugfs_remove(host->debugfs_pending_events); ++err_pending_events: ++ debugfs_remove(host->debugfs_req); ++err_req: ++ debugfs_remove(host->debugfs_regs); ++err_regs: ++ debugfs_remove(host->debugfs_root); ++err_root: ++ host->debugfs_root = NULL; ++ dev_err(&host->pdev->dev, ++ "failed to initialize debugfs for %s\n", ++ mmc_hostname(mmc)); ++} ++ ++static void atmci_cleanup_debugfs(struct atmel_mci *host) ++{ ++ if (host->debugfs_root) { ++ debugfs_remove(host->debugfs_completed_events); ++ debugfs_remove(host->debugfs_pending_events); ++ debugfs_remove(host->debugfs_req); ++ debugfs_remove(host->debugfs_regs); ++ debugfs_remove(host->debugfs_root); ++ host->debugfs_root = NULL; ++ } ++} ++#else ++static inline void atmci_init_debugfs(struct atmel_mci *host) ++{ ++ ++} ++ ++static inline void atmci_cleanup_debugfs(struct atmel_mci *host) ++{ ++ ++} ++#endif /* CONFIG_DEBUG_FS */ ++ + static inline unsigned int ns_to_clocks(struct atmel_mci *host, + unsigned int ns) + { +@@ -709,6 +935,8 @@ static int __devinit atmci_probe(struct + printk(KERN_INFO "%s: Atmel MCI controller at 0x%08lx irq %d\n", + mmc_hostname(mmc), host->mapbase, irq); + ++ atmci_init_debugfs(host); ++ + return 0; + + out_free_irq: +@@ -734,6 +962,8 @@ static int __devexit atmci_remove(struct + platform_set_drvdata(pdev, NULL); + + if (host) { ++ atmci_cleanup_debugfs(host); ++ + mmc_remove_host(host->mmc); + + mci_writel(host, IDR, ~0UL); -- cgit v1.2.3