From 1c055e55a242a33e574e48be530e06770a210dcd Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 19 Feb 2024 03:26:26 +0000
Subject: [PATCH] add r8169 read mac form eeprom
---
kernel/drivers/tty/serial/atmel_serial.c | 369 ++++++++++++++++++++++++++++++++++------------------
1 files changed, 243 insertions(+), 126 deletions(-)
diff --git a/kernel/drivers/tty/serial/atmel_serial.c b/kernel/drivers/tty/serial/atmel_serial.c
index 3ba9ed3..a1249be 100644
--- a/kernel/drivers/tty/serial/atmel_serial.c
+++ b/kernel/drivers/tty/serial/atmel_serial.c
@@ -20,20 +20,18 @@
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
-#include <linux/of_gpio.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/atmel_pdc.h>
#include <linux/uaccess.h>
#include <linux/platform_data/atmel.h>
#include <linux/timer.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/suspend.h>
#include <linux/mm.h>
+#include <asm/div64.h>
#include <asm/io.h>
#include <asm/ioctls.h>
@@ -49,10 +47,6 @@
*/
#define ATMEL_RTS_HIGH_OFFSET 16
#define ATMEL_RTS_LOW_OFFSET 20
-
-#if defined(CONFIG_SERIAL_ATMEL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
#include <linux/serial_core.h>
@@ -147,6 +141,8 @@
struct circ_buf rx_ring;
struct mctrl_gpios *gpios;
+ u32 backup_mode; /* MR saved during iso7816 operations */
+ u32 backup_brgr; /* BRGR saved during iso7816 operations */
unsigned int tx_done_mask;
u32 fifo_size;
u32 rts_high;
@@ -164,6 +160,10 @@
spinlock_t lock_suspended;
bool hd_start_rx; /* can start RX during half-duplex operation */
+
+ /* ISO7816 */
+ unsigned int fidi_min;
+ unsigned int fidi_max;
#ifdef CONFIG_PM
struct {
@@ -189,14 +189,9 @@
static struct atmel_uart_port atmel_ports[ATMEL_MAX_UART];
static DECLARE_BITMAP(atmel_ports_in_use, ATMEL_MAX_UART);
-#ifdef SUPPORT_SYSRQ
-static struct console atmel_console;
-#endif
-
#if defined(CONFIG_OF)
static const struct of_device_id atmel_serial_dt_ids[] = {
- { .compatible = "atmel,at91rm9200-usart" },
- { .compatible = "atmel,at91sam9260-usart" },
+ { .compatible = "atmel,at91rm9200-usart-serial" },
{ /* sentinel */ }
};
#endif
@@ -229,8 +224,9 @@
static inline int atmel_uart_is_half_duplex(struct uart_port *port)
{
- return (port->rs485.flags & SER_RS485_ENABLED) &&
- !(port->rs485.flags & SER_RS485_RX_DURING_TX);
+ return ((port->rs485.flags & SER_RS485_ENABLED) &&
+ !(port->rs485.flags & SER_RS485_RX_DURING_TX)) ||
+ (port->iso7816.flags & SER_ISO7816_ENABLED);
}
#ifdef CONFIG_SERIAL_ATMEL_PDC
@@ -287,50 +283,6 @@
tasklet_schedule(t);
}
-static unsigned int atmel_get_lines_status(struct uart_port *port)
-{
- struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- unsigned int status, ret = 0;
-
- status = atmel_uart_readl(port, ATMEL_US_CSR);
-
- mctrl_gpio_get(atmel_port->gpios, &ret);
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_CTS))) {
- if (ret & TIOCM_CTS)
- status &= ~ATMEL_US_CTS;
- else
- status |= ATMEL_US_CTS;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_DSR))) {
- if (ret & TIOCM_DSR)
- status &= ~ATMEL_US_DSR;
- else
- status |= ATMEL_US_DSR;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_RI))) {
- if (ret & TIOCM_RI)
- status &= ~ATMEL_US_RI;
- else
- status |= ATMEL_US_RI;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_DCD))) {
- if (ret & TIOCM_CD)
- status &= ~ATMEL_US_DCD;
- else
- status |= ATMEL_US_DCD;
- }
-
- return status;
-}
-
/* Enable or disable the rs485 support */
static int atmel_config_rs485(struct uart_port *port,
struct serial_rs485 *rs485conf)
@@ -343,16 +295,16 @@
mode = atmel_uart_readl(port, ATMEL_US_MR);
- /* Resetting serial mode to RS232 (0x0) */
- mode &= ~ATMEL_US_USMODE;
-
- port->rs485 = *rs485conf;
-
if (rs485conf->flags & SER_RS485_ENABLED) {
dev_dbg(port->dev, "Setting UART to RS485\n");
- atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
+ if (rs485conf->flags & SER_RS485_RX_DURING_TX)
+ atmel_port->tx_done_mask = ATMEL_US_TXRDY;
+ else
+ atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
+
atmel_uart_writel(port, ATMEL_US_TTGR,
rs485conf->delay_rts_after_send);
+ mode &= ~ATMEL_US_USMODE;
mode |= ATMEL_US_USMODE_RS485;
} else {
dev_dbg(port->dev, "Setting UART to RS232\n");
@@ -368,6 +320,127 @@
atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
return 0;
+}
+
+static unsigned int atmel_calc_cd(struct uart_port *port,
+ struct serial_iso7816 *iso7816conf)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ unsigned int cd;
+ u64 mck_rate;
+
+ mck_rate = (u64)clk_get_rate(atmel_port->clk);
+ do_div(mck_rate, iso7816conf->clk);
+ cd = mck_rate;
+ return cd;
+}
+
+static unsigned int atmel_calc_fidi(struct uart_port *port,
+ struct serial_iso7816 *iso7816conf)
+{
+ u64 fidi = 0;
+
+ if (iso7816conf->sc_fi && iso7816conf->sc_di) {
+ fidi = (u64)iso7816conf->sc_fi;
+ do_div(fidi, iso7816conf->sc_di);
+ }
+ return (u32)fidi;
+}
+
+/* Enable or disable the iso7816 support */
+/* Called with interrupts disabled */
+static int atmel_config_iso7816(struct uart_port *port,
+ struct serial_iso7816 *iso7816conf)
+{
+ struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ unsigned int mode;
+ unsigned int cd, fidi;
+ int ret = 0;
+
+ /* Disable interrupts */
+ atmel_uart_writel(port, ATMEL_US_IDR, atmel_port->tx_done_mask);
+
+ mode = atmel_uart_readl(port, ATMEL_US_MR);
+
+ if (iso7816conf->flags & SER_ISO7816_ENABLED) {
+ mode &= ~ATMEL_US_USMODE;
+
+ if (iso7816conf->tg > 255) {
+ dev_err(port->dev, "ISO7816: Timeguard exceeding 255\n");
+ memset(iso7816conf, 0, sizeof(struct serial_iso7816));
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if ((iso7816conf->flags & SER_ISO7816_T_PARAM)
+ == SER_ISO7816_T(0)) {
+ mode |= ATMEL_US_USMODE_ISO7816_T0 | ATMEL_US_DSNACK;
+ } else if ((iso7816conf->flags & SER_ISO7816_T_PARAM)
+ == SER_ISO7816_T(1)) {
+ mode |= ATMEL_US_USMODE_ISO7816_T1 | ATMEL_US_INACK;
+ } else {
+ dev_err(port->dev, "ISO7816: Type not supported\n");
+ memset(iso7816conf, 0, sizeof(struct serial_iso7816));
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ mode &= ~(ATMEL_US_USCLKS | ATMEL_US_NBSTOP | ATMEL_US_PAR);
+
+ /* select mck clock, and output */
+ mode |= ATMEL_US_USCLKS_MCK | ATMEL_US_CLKO;
+ /* set parity for normal/inverse mode + max iterations */
+ mode |= ATMEL_US_PAR_EVEN | ATMEL_US_NBSTOP_1 | ATMEL_US_MAX_ITER(3);
+
+ cd = atmel_calc_cd(port, iso7816conf);
+ fidi = atmel_calc_fidi(port, iso7816conf);
+ if (fidi == 0) {
+ dev_warn(port->dev, "ISO7816 fidi = 0, Generator generates no signal\n");
+ } else if (fidi < atmel_port->fidi_min
+ || fidi > atmel_port->fidi_max) {
+ dev_err(port->dev, "ISO7816 fidi = %u, value not supported\n", fidi);
+ memset(iso7816conf, 0, sizeof(struct serial_iso7816));
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if (!(port->iso7816.flags & SER_ISO7816_ENABLED)) {
+ /* port not yet in iso7816 mode: store configuration */
+ atmel_port->backup_mode = atmel_uart_readl(port, ATMEL_US_MR);
+ atmel_port->backup_brgr = atmel_uart_readl(port, ATMEL_US_BRGR);
+ }
+
+ atmel_uart_writel(port, ATMEL_US_TTGR, iso7816conf->tg);
+ atmel_uart_writel(port, ATMEL_US_BRGR, cd);
+ atmel_uart_writel(port, ATMEL_US_FIDI, fidi);
+
+ atmel_uart_writel(port, ATMEL_US_CR, ATMEL_US_TXDIS | ATMEL_US_RXEN);
+ atmel_port->tx_done_mask = ATMEL_US_TXEMPTY | ATMEL_US_NACK | ATMEL_US_ITERATION;
+ } else {
+ dev_dbg(port->dev, "Setting UART back to RS232\n");
+ /* back to last RS232 settings */
+ mode = atmel_port->backup_mode;
+ memset(iso7816conf, 0, sizeof(struct serial_iso7816));
+ atmel_uart_writel(port, ATMEL_US_TTGR, 0);
+ atmel_uart_writel(port, ATMEL_US_BRGR, atmel_port->backup_brgr);
+ atmel_uart_writel(port, ATMEL_US_FIDI, 0x174);
+
+ if (atmel_use_pdc_tx(port))
+ atmel_port->tx_done_mask = ATMEL_US_ENDTX |
+ ATMEL_US_TXBUFE;
+ else
+ atmel_port->tx_done_mask = ATMEL_US_TXRDY;
+ }
+
+ port->iso7816 = *iso7816conf;
+
+ atmel_uart_writel(port, ATMEL_US_MR, mode);
+
+err_out:
+ /* Enable interrupts */
+ atmel_uart_writel(port, ATMEL_US_IER, atmel_port->tx_done_mask);
+
+ return ret;
}
/*
@@ -748,7 +821,7 @@
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
if (port->x_char &&
- (atmel_uart_readl(port, ATMEL_US_CSR) & atmel_port->tx_done_mask)) {
+ (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY)) {
atmel_uart_write_char(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
@@ -756,8 +829,7 @@
if (uart_circ_empty(xmit) || uart_tx_stopped(port))
return;
- while (atmel_uart_readl(port, ATMEL_US_CSR) &
- atmel_port->tx_done_mask) {
+ while (atmel_uart_readl(port, ATMEL_US_CSR) & ATMEL_US_TXRDY) {
atmel_uart_write_char(port, xmit->buf[xmit->tail]);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
@@ -768,10 +840,20 @@
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
- if (!uart_circ_empty(xmit))
+ if (!uart_circ_empty(xmit)) {
+ /* we still have characters to transmit, so we should continue
+ * transmitting them when TX is ready, regardless of
+ * mode or duplexity
+ */
+ atmel_port->tx_done_mask |= ATMEL_US_TXRDY;
+
/* Enable interrupts */
atmel_uart_writel(port, ATMEL_US_IER,
atmel_port->tx_done_mask);
+ } else {
+ if (atmel_uart_is_half_duplex(port))
+ atmel_port->tx_done_mask &= ~ATMEL_US_TXRDY;
+ }
}
static void atmel_complete_tx_dma(void *arg)
@@ -791,11 +873,11 @@
port->icount.tx += atmel_port->tx_len;
- spin_lock_irq(&atmel_port->lock_tx);
+ spin_lock(&atmel_port->lock_tx);
async_tx_ack(atmel_port->desc_tx);
atmel_port->cookie_tx = -EINVAL;
atmel_port->desc_tx = NULL;
- spin_unlock_irq(&atmel_port->lock_tx);
+ spin_unlock(&atmel_port->lock_tx);
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
@@ -934,6 +1016,7 @@
static int atmel_prepare_tx_dma(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct device *mfd_dev = port->dev->parent;
dma_cap_mask_t mask;
struct dma_slave_config config;
int ret, nent;
@@ -941,7 +1024,7 @@
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- atmel_port->chan_tx = dma_request_slave_channel(port->dev, "tx");
+ atmel_port->chan_tx = dma_request_slave_channel(mfd_dev, "tx");
if (atmel_port->chan_tx == NULL)
goto chan_err;
dev_info(port->dev, "using %s for tx DMA transfers\n",
@@ -990,7 +1073,7 @@
chan_err:
dev_err(port->dev, "TX channel not available, switch to pio\n");
- atmel_port->use_dma_tx = 0;
+ atmel_port->use_dma_tx = false;
if (atmel_port->chan_tx)
atmel_release_tx_dma(port);
return -EINVAL;
@@ -1112,6 +1195,7 @@
static int atmel_prepare_rx_dma(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct device *mfd_dev = port->dev->parent;
struct dma_async_tx_descriptor *desc;
dma_cap_mask_t mask;
struct dma_slave_config config;
@@ -1123,7 +1207,7 @@
dma_cap_zero(mask);
dma_cap_set(DMA_CYCLIC, mask);
- atmel_port->chan_rx = dma_request_slave_channel(port->dev, "rx");
+ atmel_port->chan_rx = dma_request_slave_channel(mfd_dev, "rx");
if (atmel_port->chan_rx == NULL)
goto chan_err;
dev_info(port->dev, "using %s for rx DMA transfers\n",
@@ -1195,7 +1279,7 @@
chan_err:
dev_err(port->dev, "RX channel not available, switch to pio\n");
- atmel_port->use_dma_rx = 0;
+ atmel_port->use_dma_rx = false;
if (atmel_port->chan_rx)
atmel_release_rx_dma(port);
return -EINVAL;
@@ -1321,6 +1405,9 @@
wake_up_interruptible(&port->state->port.delta_msr_wait);
}
}
+
+ if (pending & (ATMEL_US_NACK | ATMEL_US_ITERATION))
+ dev_dbg(port->dev, "ISO7816 ERROR (0x%08x)\n", pending);
}
/*
@@ -1335,7 +1422,7 @@
spin_lock(&atmel_port->lock_suspended);
do {
- status = atmel_get_lines_status(port);
+ status = atmel_uart_readl(port, ATMEL_US_CSR);
mask = atmel_uart_readl(port, ATMEL_US_IMR);
pending = status & mask;
if (!pending)
@@ -1619,7 +1706,7 @@
DMA_FROM_DEVICE);
kfree(atmel_port->pdc_rx[0].buf);
}
- atmel_port->use_pdc_rx = 0;
+ atmel_port->use_pdc_rx = false;
return -ENOMEM;
}
pdc->dma_addr = dma_map_single(port->dev,
@@ -1645,10 +1732,11 @@
/*
* tasklet handling tty stuff outside the interrupt handler.
*/
-static void atmel_tasklet_rx_func(unsigned long data)
+static void atmel_tasklet_rx_func(struct tasklet_struct *t)
{
- struct uart_port *port = (struct uart_port *)data;
- struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct atmel_uart_port *atmel_port = from_tasklet(atmel_port, t,
+ tasklet_rx);
+ struct uart_port *port = &atmel_port->uart;
/* The interrupt handler does not take the lock */
spin_lock(&port->lock);
@@ -1656,10 +1744,11 @@
spin_unlock(&port->lock);
}
-static void atmel_tasklet_tx_func(unsigned long data)
+static void atmel_tasklet_tx_func(struct tasklet_struct *t)
{
- struct uart_port *port = (struct uart_port *)data;
- struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+ struct atmel_uart_port *atmel_port = from_tasklet(atmel_port, t,
+ tasklet_tx);
+ struct uart_port *port = &atmel_port->uart;
/* The interrupt handler does not take the lock */
spin_lock(&port->lock);
@@ -1765,6 +1854,22 @@
atmel_port->has_frac_baudrate = true;
atmel_port->has_hw_timer = true;
atmel_port->rtor = ATMEL_US_RTOR;
+ version = atmel_uart_readl(port, ATMEL_US_VERSION);
+ switch (version) {
+ case 0x814: /* sama5d2 */
+ fallthrough;
+ case 0x701: /* sama5d4 */
+ atmel_port->fidi_min = 3;
+ atmel_port->fidi_max = 65535;
+ break;
+ case 0x502: /* sam9x5, sama5d3 */
+ atmel_port->fidi_min = 3;
+ atmel_port->fidi_max = 2047;
+ break;
+ default:
+ atmel_port->fidi_min = 1;
+ atmel_port->fidi_max = 2047;
+ }
} else if (name == dbgu_uart) {
dev_dbg(port->dev, "Dbgu or uart without hw timer\n");
} else {
@@ -1818,10 +1923,8 @@
}
atomic_set(&atmel_port->tasklet_shutdown, 0);
- tasklet_init(&atmel_port->tasklet_rx, atmel_tasklet_rx_func,
- (unsigned long)port);
- tasklet_init(&atmel_port->tasklet_tx, atmel_tasklet_tx_func,
- (unsigned long)port);
+ tasklet_setup(&atmel_port->tasklet_rx, atmel_tasklet_rx_func);
+ tasklet_setup(&atmel_port->tasklet_tx, atmel_tasklet_tx_func);
/*
* Initialize DMA (if necessary)
@@ -1868,7 +1971,7 @@
}
/* Save current CSR for comparison in atmel_tasklet_func() */
- atmel_port->irq_status_prev = atmel_get_lines_status(port);
+ atmel_port->irq_status_prev = atmel_uart_readl(port, ATMEL_US_CSR);
/*
* Finally, enable the serial port
@@ -2138,6 +2241,17 @@
atmel_uart_writel(port, ATMEL_US_TTGR,
port->rs485.delay_rts_after_send);
mode |= ATMEL_US_USMODE_RS485;
+ } else if (port->iso7816.flags & SER_ISO7816_ENABLED) {
+ atmel_uart_writel(port, ATMEL_US_TTGR, port->iso7816.tg);
+ /* select mck clock, and output */
+ mode |= ATMEL_US_USCLKS_MCK | ATMEL_US_CLKO;
+ /* set max iterations */
+ mode |= ATMEL_US_MAX_ITER(3);
+ if ((port->iso7816.flags & SER_ISO7816_T_PARAM)
+ == SER_ISO7816_T(0))
+ mode |= ATMEL_US_USMODE_ISO7816_T0;
+ else
+ mode |= ATMEL_US_USMODE_ISO7816_T1;
} else if (termios->c_cflag & CRTSCTS) {
/* RS232 with hardware handshake (RTS/CTS) */
if (atmel_use_fifo(port) &&
@@ -2193,7 +2307,8 @@
}
quot = cd | fp << ATMEL_US_FP_OFFSET;
- atmel_uart_writel(port, ATMEL_US_BRGR, quot);
+ if (!(port->iso7816.flags & SER_ISO7816_ENABLED))
+ atmel_uart_writel(port, ATMEL_US_BRGR, quot);
/* set the mode, clock divisor, parity, stop bits and data size */
atmel_uart_writel(port, ATMEL_US_MR, mode);
@@ -2262,8 +2377,8 @@
*/
static void atmel_release_port(struct uart_port *port)
{
- struct platform_device *pdev = to_platform_device(port->dev);
- int size = pdev->resource[0].end - pdev->resource[0].start + 1;
+ struct platform_device *mpdev = to_platform_device(port->dev->parent);
+ int size = resource_size(mpdev->resource);
release_mem_region(port->mapbase, size);
@@ -2278,8 +2393,8 @@
*/
static int atmel_request_port(struct uart_port *port)
{
- struct platform_device *pdev = to_platform_device(port->dev);
- int size = pdev->resource[0].end - pdev->resource[0].start + 1;
+ struct platform_device *mpdev = to_platform_device(port->dev->parent);
+ int size = resource_size(mpdev->resource);
if (!request_mem_region(port->mapbase, size, "atmel_serial"))
return -EBUSY;
@@ -2381,27 +2496,31 @@
{
int ret;
struct uart_port *port = &atmel_port->uart;
+ struct platform_device *mpdev = to_platform_device(pdev->dev.parent);
atmel_init_property(atmel_port, pdev);
atmel_set_ops(port);
-
- uart_get_rs485_mode(&pdev->dev, &port->rs485);
port->iotype = UPIO_MEM;
port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP;
port->ops = &atmel_pops;
port->fifosize = 1;
port->dev = &pdev->dev;
- port->mapbase = pdev->resource[0].start;
- port->irq = pdev->resource[1].start;
+ port->mapbase = mpdev->resource[0].start;
+ port->irq = mpdev->resource[1].start;
port->rs485_config = atmel_config_rs485;
- port->membase = NULL;
+ port->iso7816_config = atmel_config_iso7816;
+ port->membase = NULL;
memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));
+ ret = uart_get_rs485_mode(port);
+ if (ret)
+ return ret;
+
/* for console, the clock could already be configured */
if (!atmel_port->clk) {
- atmel_port->clk = clk_get(&pdev->dev, "usart");
+ atmel_port->clk = clk_get(&mpdev->dev, "usart");
if (IS_ERR(atmel_port->clk)) {
ret = PTR_ERR(atmel_port->clk);
atmel_port->clk = NULL;
@@ -2418,8 +2537,11 @@
/* only enable clock when USART is in use */
}
- /* Use TXEMPTY for interrupt when rs485 else TXRDY or ENDTX|TXBUFE */
- if (port->rs485.flags & SER_RS485_ENABLED)
+ /*
+ * Use TXEMPTY for interrupt when rs485 or ISO7816 else TXRDY or
+ * ENDTX|TXBUFE
+ */
+ if (atmel_uart_is_half_duplex(port))
atmel_port->tx_done_mask = ATMEL_US_TXEMPTY;
else if (atmel_use_pdc_tx(port)) {
port->fifosize = PDC_BUFFER_SIZE;
@@ -2511,13 +2633,7 @@
else if (mr == ATMEL_US_PAR_ODD)
*parity = 'o';
- /*
- * The serial core only rounds down when matching this to a
- * supported baud rate. Make sure we don't end up slightly
- * lower than one of those, as it would make us fall through
- * to a much lower baud rate than we really want.
- */
- *baud = port->uartclk / (16 * (quot - 1));
+ *baud = port->uartclk / (16 * quot);
}
static int __init atmel_console_setup(struct console *co, char *options)
@@ -2566,18 +2682,8 @@
#define ATMEL_CONSOLE_DEVICE (&atmel_console)
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
- return port->cons && port->cons->index == port->line;
-}
-
#else
#define ATMEL_CONSOLE_DEVICE NULL
-
-static inline bool atmel_is_console_port(struct uart_port *port)
-{
- return false;
-}
#endif
static struct uart_driver atmel_uart = {
@@ -2606,14 +2712,14 @@
struct uart_port *port = platform_get_drvdata(pdev);
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- if (atmel_is_console_port(port) && console_suspend_enabled) {
+ if (uart_console(port) && console_suspend_enabled) {
/* Drain the TX shifter */
while (!(atmel_uart_readl(port, ATMEL_US_CSR) &
ATMEL_US_TXEMPTY))
cpu_relax();
}
- if (atmel_is_console_port(port) && !console_suspend_enabled) {
+ if (uart_console(port) && !console_suspend_enabled) {
/* Cache register values as we won't get a full shutdown/startup
* cycle
*/
@@ -2649,7 +2755,7 @@
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
unsigned long flags;
- if (atmel_is_console_port(port) && !console_suspend_enabled) {
+ if (uart_console(port) && !console_suspend_enabled) {
atmel_uart_writel(port, ATMEL_US_MR, atmel_port->cache.mr);
atmel_uart_writel(port, ATMEL_US_IER, atmel_port->cache.imr);
atmel_uart_writel(port, ATMEL_US_BRGR, atmel_port->cache.brgr);
@@ -2734,12 +2840,21 @@
static int atmel_serial_probe(struct platform_device *pdev)
{
struct atmel_uart_port *atmel_port;
- struct device_node *np = pdev->dev.of_node;
+ struct device_node *np = pdev->dev.parent->of_node;
void *data;
- int ret = -ENODEV;
+ int ret;
bool rs485_enabled;
BUILD_BUG_ON(ATMEL_SERIAL_RINGSIZE & (ATMEL_SERIAL_RINGSIZE - 1));
+
+ /*
+ * In device tree there is no node with "atmel,at91rm9200-usart-serial"
+ * as compatible string. This driver is probed by at91-usart mfd driver
+ * which is just a wrapper over the atmel_serial driver and
+ * spi-at91-usart driver. All attributes needed by this driver are
+ * found in of_node of parent.
+ */
+ pdev->dev.of_node = np;
ret = of_alias_get_id(np, "serial");
if (ret < 0)
@@ -2761,6 +2876,7 @@
atmel_port = &atmel_ports[ret];
atmel_port->backup_imr = 0;
atmel_port->uart.line = ret;
+ atmel_port->uart.has_sysrq = IS_ENABLED(CONFIG_SERIAL_ATMEL_CONSOLE);
atmel_serial_probe_fifos(atmel_port, pdev);
atomic_set(&atmel_port->tasklet_shutdown, 0);
@@ -2793,7 +2909,7 @@
goto err_add_port;
#ifdef CONFIG_SERIAL_ATMEL_CONSOLE
- if (atmel_is_console_port(&atmel_port->uart)
+ if (uart_console(&atmel_port->uart)
&& ATMEL_CONSOLE_DEVICE->flags & CON_ENABLED) {
/*
* The serial core enabled the clock for us, so undo
@@ -2836,7 +2952,7 @@
kfree(atmel_port->rx_ring.buf);
atmel_port->rx_ring.buf = NULL;
err_alloc_ring:
- if (!atmel_is_console_port(&atmel_port->uart)) {
+ if (!uart_console(&atmel_port->uart)) {
clk_put(atmel_port->clk);
atmel_port->clk = NULL;
}
@@ -2876,6 +2992,7 @@
clk_put(atmel_port->clk);
atmel_port->clk = NULL;
+ pdev->dev.of_node = NULL;
return ret;
}
@@ -2886,7 +3003,7 @@
.suspend = atmel_serial_suspend,
.resume = atmel_serial_resume,
.driver = {
- .name = "atmel_usart",
+ .name = "atmel_usart_serial",
.of_match_table = of_match_ptr(atmel_serial_dt_ids),
},
};
--
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