summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/tty/n_gsm.c26
-rw-r--r--drivers/tty/n_tty.c1
-rw-r--r--drivers/tty/serial/8250.c1
-rw-r--r--drivers/tty/serial/8250_pci.c59
-rw-r--r--drivers/tty/serial/amba-pl011.c123
-rw-r--r--drivers/tty/serial/bcm63xx_uart.c18
-rw-r--r--drivers/tty/serial/jsm/jsm_driver.c2
-rw-r--r--drivers/tty/serial/s5pv210.c4
-rw-r--r--drivers/tty/tty_ldisc.c4
9 files changed, 223 insertions, 15 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 09e8c7d53af3..19b4ae052af8 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -875,7 +875,8 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,
*dp++ = last << 7 | first << 6 | 1; /* EA */
len--;
}
- memcpy(dp, skb_pull(dlci->skb, len), len);
+ memcpy(dp, dlci->skb->data, len);
+ skb_pull(dlci->skb, len);
__gsm_data_queue(dlci, msg);
if (last)
dlci->skb = NULL;
@@ -984,10 +985,22 @@ static void gsm_control_reply(struct gsm_mux *gsm, int cmd, u8 *data,
*/
static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci,
- u32 modem)
+ u32 modem, int clen)
{
int mlines = 0;
- u8 brk = modem >> 6;
+ u8 brk = 0;
+
+ /* The modem status command can either contain one octet (v.24 signals)
+ or two octets (v.24 signals + break signals). The length field will
+ either be 2 or 3 respectively. This is specified in section
+ 5.4.6.3.7 of the 27.010 mux spec. */
+
+ if (clen == 2)
+ modem = modem & 0x7f;
+ else {
+ brk = modem & 0x7f;
+ modem = (modem >> 7) & 0x7f;
+ };
/* Flow control/ready to communicate */
if (modem & MDM_FC) {
@@ -1061,7 +1074,7 @@ static void gsm_control_modem(struct gsm_mux *gsm, u8 *data, int clen)
return;
}
tty = tty_port_tty_get(&dlci->port);
- gsm_process_modem(tty, dlci, modem);
+ gsm_process_modem(tty, dlci, modem, clen);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
@@ -1482,12 +1495,13 @@ static void gsm_dlci_begin_close(struct gsm_dlci *dlci)
* open we shovel the bits down it, if not we drop them.
*/
-static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int len)
+static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int clen)
{
/* krefs .. */
struct tty_port *port = &dlci->port;
struct tty_struct *tty = tty_port_tty_get(port);
unsigned int modem = 0;
+ int len = clen;
if (debug & 16)
pr_debug("%d bytes for tty %p\n", len, tty);
@@ -1507,7 +1521,7 @@ static void gsm_dlci_data(struct gsm_dlci *dlci, u8 *data, int len)
if (len == 0)
return;
}
- gsm_process_modem(tty, dlci, modem);
+ gsm_process_modem(tty, dlci, modem, clen);
/* Line state will go via DLCI 0 controls only */
case 1:
default:
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0ad32888091c..c3954fbf6ac4 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -1815,6 +1815,7 @@ do_it_again:
/* FIXME: does n_tty_set_room need locking ? */
n_tty_set_room(tty);
timeout = schedule_timeout(timeout);
+ BUG_ON(!tty->read_buf);
continue;
}
__set_current_state(TASK_RUNNING);
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index b40f7b90c81d..b4129f53fb1b 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -3318,6 +3318,7 @@ void serial8250_unregister_port(int line)
uart->port.flags &= ~UPF_BOOT_AUTOCONF;
uart->port.type = PORT_UNKNOWN;
uart->port.dev = &serial8250_isa_devs->dev;
+ uart->capabilities = uart_config[uart->port.type].flags;
uart_add_one_port(&serial8250_reg, &uart->port);
} else {
uart->port.dev = NULL;
diff --git a/drivers/tty/serial/8250_pci.c b/drivers/tty/serial/8250_pci.c
index 78e98a5cef96..f41b4259ecdd 100644
--- a/drivers/tty/serial/8250_pci.c
+++ b/drivers/tty/serial/8250_pci.c
@@ -994,6 +994,15 @@ static int skip_tx_en_setup(struct serial_private *priv,
return pci_default_setup(priv, board, port, idx);
}
+static int pci_eg20t_init(struct pci_dev *dev)
+{
+#if defined(CONFIG_SERIAL_PCH_UART) || defined(CONFIG_SERIAL_PCH_UART_MODULE)
+ return -ENODEV;
+#else
+ return 0;
+#endif
+}
+
/* This should be in linux/pci_ids.h */
#define PCI_VENDOR_ID_SBSMODULARIO 0x124B
#define PCI_SUBVENDOR_ID_SBSMODULARIO 0x124B
@@ -1446,6 +1455,56 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.init = pci_oxsemi_tornado_init,
.setup = pci_default_setup,
},
+ {
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x8811,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x8812,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x8813,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x8814,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x8027,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x8028,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x8029,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x800C,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x800D,
+ .init = pci_eg20t_init,
+ },
+ {
+ .vendor = 0x10DB,
+ .device = 0x800D,
+ .init = pci_eg20t_init,
+ },
/*
* Cronyx Omega PCI (PLX-chip based)
*/
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 8dc0541feecc..f5f6831b0a64 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -50,6 +50,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
+#include <linux/delay.h>
#include <asm/io.h>
#include <asm/sizes.h>
@@ -65,6 +66,30 @@
#define UART_DR_ERROR (UART011_DR_OE|UART011_DR_BE|UART011_DR_PE|UART011_DR_FE)
#define UART_DUMMY_DR_RX (1 << 16)
+
+#define UART_WA_SAVE_NR 14
+
+static void pl011_lockup_wa(unsigned long data);
+static const u32 uart_wa_reg[UART_WA_SAVE_NR] = {
+ ST_UART011_DMAWM,
+ ST_UART011_TIMEOUT,
+ ST_UART011_LCRH_RX,
+ UART011_IBRD,
+ UART011_FBRD,
+ ST_UART011_LCRH_TX,
+ UART011_IFLS,
+ ST_UART011_XFCR,
+ ST_UART011_XON1,
+ ST_UART011_XON2,
+ ST_UART011_XOFF1,
+ ST_UART011_XOFF2,
+ UART011_CR,
+ UART011_IMSC
+};
+
+static u32 uart_wa_regdata[UART_WA_SAVE_NR];
+static DECLARE_TASKLET(pl011_lockup_tlet, pl011_lockup_wa, 0);
+
/* There is by now at least one vendor with differing details, so handle it */
struct vendor_data {
unsigned int ifls;
@@ -72,6 +97,7 @@ struct vendor_data {
unsigned int lcrh_tx;
unsigned int lcrh_rx;
bool oversampling;
+ bool interrupt_may_hang; /* vendor-specific */
bool dma_threshold;
};
@@ -90,9 +116,12 @@ static struct vendor_data vendor_st = {
.lcrh_tx = ST_UART011_LCRH_TX,
.lcrh_rx = ST_UART011_LCRH_RX,
.oversampling = true,
+ .interrupt_may_hang = true,
.dma_threshold = true,
};
+static struct uart_amba_port *amba_ports[UART_NR];
+
/* Deals with DMA transactions */
struct pl011_sgbuf {
@@ -132,6 +161,7 @@ struct uart_amba_port {
unsigned int lcrh_rx; /* vendor-specific */
bool autorts;
char type[12];
+ bool interrupt_may_hang; /* vendor-specific */
#ifdef CONFIG_DMA_ENGINE
/* DMA stuff */
bool using_tx_dma;
@@ -1008,6 +1038,68 @@ static inline bool pl011_dma_rx_running(struct uart_amba_port *uap)
#endif
+/*
+ * pl011_lockup_wa
+ * This workaround aims to break the deadlock situation
+ * when after long transfer over uart in hardware flow
+ * control, uart interrupt registers cannot be cleared.
+ * Hence uart transfer gets blocked.
+ *
+ * It is seen that during such deadlock condition ICR
+ * don't get cleared even on multiple write. This leads
+ * pass_counter to decrease and finally reach zero. This
+ * can be taken as trigger point to run this UART_BT_WA.
+ *
+ */
+static void pl011_lockup_wa(unsigned long data)
+{
+ struct uart_amba_port *uap = amba_ports[0];
+ void __iomem *base = uap->port.membase;
+ struct circ_buf *xmit = &uap->port.state->xmit;
+ struct tty_struct *tty = uap->port.state->port.tty;
+ int buf_empty_retries = 200;
+ int loop;
+
+ /* Stop HCI layer from submitting data for tx */
+ tty->hw_stopped = 1;
+ while (!uart_circ_empty(xmit)) {
+ if (buf_empty_retries-- == 0)
+ break;
+ udelay(100);
+ }
+
+ /* Backup registers */
+ for (loop = 0; loop < UART_WA_SAVE_NR; loop++)
+ uart_wa_regdata[loop] = readl(base + uart_wa_reg[loop]);
+
+ /* Disable UART so that FIFO data is flushed out */
+ writew(0x00, uap->port.membase + UART011_CR);
+
+ /* Soft reset UART module */
+ if (uap->port.dev->platform_data) {
+ struct amba_pl011_data *plat;
+
+ plat = uap->port.dev->platform_data;
+ if (plat->reset)
+ plat->reset();
+ }
+
+ /* Restore registers */
+ for (loop = 0; loop < UART_WA_SAVE_NR; loop++)
+ writew(uart_wa_regdata[loop] ,
+ uap->port.membase + uart_wa_reg[loop]);
+
+ /* Initialise the old status of the modem signals */
+ uap->old_status = readw(uap->port.membase + UART01x_FR) &
+ UART01x_FR_MODEM_ANY;
+
+ if (readl(base + UART011_MIS) & 0x2)
+ printk(KERN_EMERG "UART_BT_WA: ***FAILED***\n");
+
+ /* Start Tx/Rx */
+ tty->hw_stopped = 0;
+}
+
static void pl011_stop_tx(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
@@ -1158,8 +1250,11 @@ static irqreturn_t pl011_int(int irq, void *dev_id)
if (status & UART011_TXIS)
pl011_tx_chars(uap);
- if (pass_counter-- == 0)
+ if (pass_counter-- == 0) {
+ if (uap->interrupt_may_hang)
+ tasklet_schedule(&pl011_lockup_tlet);
break;
+ }
status = readw(uap->port.membase + UART011_MIS);
} while (status != 0);
@@ -1339,6 +1434,14 @@ static int pl011_startup(struct uart_port *port)
writew(uap->im, uap->port.membase + UART011_IMSC);
spin_unlock_irq(&uap->port.lock);
+ if (uap->port.dev->platform_data) {
+ struct amba_pl011_data *plat;
+
+ plat = uap->port.dev->platform_data;
+ if (plat->init)
+ plat->init();
+ }
+
return 0;
clk_dis:
@@ -1394,6 +1497,15 @@ static void pl011_shutdown(struct uart_port *port)
* Shut down the clock producer
*/
clk_disable(uap->clk);
+
+ if (uap->port.dev->platform_data) {
+ struct amba_pl011_data *plat;
+
+ plat = uap->port.dev->platform_data;
+ if (plat->exit)
+ plat->exit();
+ }
+
}
static void
@@ -1700,6 +1812,14 @@ static int __init pl011_console_setup(struct console *co, char *options)
if (!uap)
return -ENODEV;
+ if (uap->port.dev->platform_data) {
+ struct amba_pl011_data *plat;
+
+ plat = uap->port.dev->platform_data;
+ if (plat->init)
+ plat->init();
+ }
+
uap->port.uartclk = clk_get_rate(uap->clk);
if (options)
@@ -1774,6 +1894,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
uap->lcrh_rx = vendor->lcrh_rx;
uap->lcrh_tx = vendor->lcrh_tx;
uap->fifosize = vendor->fifosize;
+ uap->interrupt_may_hang = vendor->interrupt_may_hang;
uap->port.dev = &dev->dev;
uap->port.mapbase = dev->res.start;
uap->port.membase = base;
diff --git a/drivers/tty/serial/bcm63xx_uart.c b/drivers/tty/serial/bcm63xx_uart.c
index a1a0e55d0807..c0b68b9cad91 100644
--- a/drivers/tty/serial/bcm63xx_uart.c
+++ b/drivers/tty/serial/bcm63xx_uart.c
@@ -250,6 +250,20 @@ static void bcm_uart_do_rx(struct uart_port *port)
/* get overrun/fifo empty information from ier
* register */
iestat = bcm_uart_readl(port, UART_IR_REG);
+
+ if (unlikely(iestat & UART_IR_STAT(UART_IR_RXOVER))) {
+ unsigned int val;
+
+ /* fifo reset is required to clear
+ * interrupt */
+ val = bcm_uart_readl(port, UART_CTL_REG);
+ val |= UART_CTL_RSTRXFIFO_MASK;
+ bcm_uart_writel(port, val, UART_CTL_REG);
+
+ port->icount.overrun++;
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ }
+
if (!(iestat & UART_IR_STAT(UART_IR_RXNOTEMPTY)))
break;
@@ -284,10 +298,6 @@ static void bcm_uart_do_rx(struct uart_port *port)
if (uart_handle_sysrq_char(port, c))
continue;
- if (unlikely(iestat & UART_IR_STAT(UART_IR_RXOVER))) {
- port->icount.overrun++;
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
if ((cstat & port->ignore_status_mask) == 0)
tty_insert_flip_char(tty, c, flag);
diff --git a/drivers/tty/serial/jsm/jsm_driver.c b/drivers/tty/serial/jsm/jsm_driver.c
index 18f548449c63..96da17868cf3 100644
--- a/drivers/tty/serial/jsm/jsm_driver.c
+++ b/drivers/tty/serial/jsm/jsm_driver.c
@@ -125,7 +125,7 @@ static int __devinit jsm_probe_one(struct pci_dev *pdev, const struct pci_device
brd->bd_uart_offset = 0x200;
brd->bd_dividend = 921600;
- brd->re_map_membase = ioremap(brd->membase, 0x1000);
+ brd->re_map_membase = ioremap(brd->membase, pci_resource_len(pdev, 0));
if (!brd->re_map_membase) {
dev_err(&pdev->dev,
"card has no PCI Memory resources, "
diff --git a/drivers/tty/serial/s5pv210.c b/drivers/tty/serial/s5pv210.c
index fb2619f93d84..dd194dc80ee9 100644
--- a/drivers/tty/serial/s5pv210.c
+++ b/drivers/tty/serial/s5pv210.c
@@ -30,7 +30,7 @@ static int s5pv210_serial_setsource(struct uart_port *port,
struct s3c2410_uartcfg *cfg = port->dev->platform_data;
unsigned long ucon = rd_regl(port, S3C2410_UCON);
- if ((cfg->clocks_size) == 1)
+ if (cfg->flags & NO_NEED_CHECK_CLKSRC)
return 0;
if (strcmp(clk->name, "pclk") == 0)
@@ -55,7 +55,7 @@ static int s5pv210_serial_getsource(struct uart_port *port,
clk->divisor = 1;
- if ((cfg->clocks_size) == 1)
+ if (cfg->flags & NO_NEED_CHECK_CLKSRC)
return 0;
switch (ucon & S5PV210_UCON_CLKMASK) {
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 5d01d32e2cf0..ef925d581713 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -555,7 +555,7 @@ static void tty_ldisc_flush_works(struct tty_struct *tty)
static int tty_ldisc_wait_idle(struct tty_struct *tty)
{
int ret;
- ret = wait_event_interruptible_timeout(tty_ldisc_idle,
+ ret = wait_event_timeout(tty_ldisc_idle,
atomic_read(&tty->ldisc->users) == 1, 5 * HZ);
if (ret < 0)
return ret;
@@ -763,6 +763,8 @@ static int tty_ldisc_reinit(struct tty_struct *tty, int ldisc)
if (IS_ERR(ld))
return -1;
+ WARN_ON_ONCE(tty_ldisc_wait_idle(tty));
+
tty_ldisc_close(tty, tty->ldisc);
tty_ldisc_put(tty->ldisc);
tty->ldisc = NULL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 18:03:35 +0000