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path: root/drivers/char/nozomi.c
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Diffstat (limited to 'drivers/char/nozomi.c')
-rw-r--r--drivers/char/nozomi.c81
1 files changed, 53 insertions, 28 deletions
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index dfaab2322de..6a6843a0a67 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -190,6 +190,14 @@ enum card_type {
F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
};
+/* Initialization states a card can be in */
+enum card_state {
+ NOZOMI_STATE_UKNOWN = 0,
+ NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
+ NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
+ NOZOMI_STATE_READY = 3, /* flowcontrols received */
+};
+
/* Two different toggle channels exist */
enum channel_type {
CH_A = 0,
@@ -385,6 +393,7 @@ struct nozomi {
spinlock_t spin_mutex; /* secures access to registers and tty */
unsigned int index_start;
+ enum card_state state;
u32 open_ttys;
};
@@ -429,7 +438,7 @@ static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
u32 size_bytes)
{
u32 i = 0;
- const u32 *ptr = (__force u32 *) mem_addr_start;
+ const u32 __iomem *ptr = mem_addr_start;
u16 *buf16;
if (unlikely(!ptr || !buf))
@@ -439,11 +448,11 @@ static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
switch (size_bytes) {
case 2: /* 2 bytes */
buf16 = (u16 *) buf;
- *buf16 = __le16_to_cpu(readw((void __iomem *)ptr));
+ *buf16 = __le16_to_cpu(readw(ptr));
goto out;
break;
case 4: /* 4 bytes */
- *(buf) = __le32_to_cpu(readl((void __iomem *)ptr));
+ *(buf) = __le32_to_cpu(readl(ptr));
goto out;
break;
}
@@ -452,11 +461,11 @@ static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
if (size_bytes - i == 2) {
/* Handle 2 bytes in the end */
buf16 = (u16 *) buf;
- *(buf16) = __le16_to_cpu(readw((void __iomem *)ptr));
+ *(buf16) = __le16_to_cpu(readw(ptr));
i += 2;
} else {
/* Read 4 bytes */
- *(buf) = __le32_to_cpu(readl((void __iomem *)ptr));
+ *(buf) = __le32_to_cpu(readl(ptr));
i += 4;
}
buf++;
@@ -475,7 +484,7 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
u32 size_bytes)
{
u32 i = 0;
- u32 *ptr = (__force u32 *) mem_addr_start;
+ u32 __iomem *ptr = mem_addr_start;
const u16 *buf16;
if (unlikely(!ptr || !buf))
@@ -485,7 +494,7 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
switch (size_bytes) {
case 2: /* 2 bytes */
buf16 = (const u16 *)buf;
- writew(__cpu_to_le16(*buf16), (void __iomem *)ptr);
+ writew(__cpu_to_le16(*buf16), ptr);
return 2;
break;
case 1: /*
@@ -493,7 +502,7 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
* so falling through..
*/
case 4: /* 4 bytes */
- writel(__cpu_to_le32(*buf), (void __iomem *)ptr);
+ writel(__cpu_to_le32(*buf), ptr);
return 4;
break;
}
@@ -502,11 +511,11 @@ static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
if (size_bytes - i == 2) {
/* 2 bytes */
buf16 = (const u16 *)buf;
- writew(__cpu_to_le16(*buf16), (void __iomem *)ptr);
+ writew(__cpu_to_le16(*buf16), ptr);
i += 2;
} else {
/* 4 bytes */
- writel(__cpu_to_le32(*buf), (void __iomem *)ptr);
+ writel(__cpu_to_le32(*buf), ptr);
i += 4;
}
buf++;
@@ -686,6 +695,7 @@ static int nozomi_read_config_table(struct nozomi *dc)
dc->last_ier = dc->last_ier | CTRL_DL;
writew(dc->last_ier, dc->reg_ier);
+ dc->state = NOZOMI_STATE_ALLOCATED;
dev_info(&dc->pdev->dev, "Initialization OK!\n");
return 1;
}
@@ -944,6 +954,14 @@ static int receive_flow_control(struct nozomi *dc)
case CTRL_APP2:
port = PORT_APP2;
enable_ier = APP2_DL;
+ if (dc->state == NOZOMI_STATE_ALLOCATED) {
+ /*
+ * After card initialization the flow control
+ * received for APP2 is always the last
+ */
+ dc->state = NOZOMI_STATE_READY;
+ dev_info(&dc->pdev->dev, "Device READY!\n");
+ }
break;
default:
dev_err(&dc->pdev->dev,
@@ -1366,22 +1384,12 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
dc->pdev = pdev;
- /* Find out what card type it is */
- nozomi_get_card_type(dc);
-
ret = pci_enable_device(dc->pdev);
if (ret) {
dev_err(&pdev->dev, "Failed to enable PCI Device\n");
goto err_free;
}
- start = pci_resource_start(dc->pdev, 0);
- if (start == 0) {
- dev_err(&pdev->dev, "No I/O address for card detected\n");
- ret = -ENODEV;
- goto err_disable_device;
- }
-
ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
if (ret) {
dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
@@ -1389,6 +1397,16 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
goto err_disable_device;
}
+ start = pci_resource_start(dc->pdev, 0);
+ if (start == 0) {
+ dev_err(&pdev->dev, "No I/O address for card detected\n");
+ ret = -ENODEV;
+ goto err_rel_regs;
+ }
+
+ /* Find out what card type it is */
+ nozomi_get_card_type(dc);
+
dc->base_addr = ioremap(start, dc->card_type);
if (!dc->base_addr) {
dev_err(&pdev->dev, "Unable to map card MMIO\n");
@@ -1425,6 +1443,14 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
dc->index_start = ndev_idx * MAX_PORT;
ndevs[ndev_idx] = dc;
+ pci_set_drvdata(pdev, dc);
+
+ /* Enable RESET interrupt */
+ dc->last_ier = RESET;
+ iowrite16(dc->last_ier, dc->reg_ier);
+
+ dc->state = NOZOMI_STATE_ENABLED;
+
for (i = 0; i < MAX_PORT; i++) {
mutex_init(&dc->port[i].tty_sem);
dc->port[i].tty_open_count = 0;
@@ -1433,12 +1459,6 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev,
&pdev->dev);
}
- /* Enable RESET interrupt. */
- dc->last_ier = RESET;
- writew(dc->last_ier, dc->reg_ier);
-
- pci_set_drvdata(pdev, dc);
-
return 0;
err_free_sbuf:
@@ -1553,7 +1573,7 @@ static int ntty_open(struct tty_struct *tty, struct file *file)
struct nozomi *dc = get_dc_by_tty(tty);
unsigned long flags;
- if (!port || !dc)
+ if (!port || !dc || dc->state != NOZOMI_STATE_READY)
return -ENODEV;
if (mutex_lock_interruptible(&port->tty_sem))
@@ -1716,6 +1736,10 @@ static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
+ struct nozomi *dc = get_dc_by_tty(tty);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dc->spin_mutex, flags);
if (set & TIOCM_RTS)
set_rts(tty, 1);
else if (clear & TIOCM_RTS)
@@ -1725,6 +1749,7 @@ static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
set_dtr(tty, 1);
else if (clear & TIOCM_DTR)
set_dtr(tty, 0);
+ spin_unlock_irqrestore(&dc->spin_mutex, flags);
return 0;
}
@@ -1762,7 +1787,7 @@ static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
icount.brk = cnow.brk;
icount.buf_overrun = cnow.buf_overrun;
- return copy_to_user(argp, &icount, sizeof(icount));
+ return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
}
static int ntty_ioctl(struct tty_struct *tty, struct file *file,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-06 19:06:28 +0000