+++ /dev/null
-/*
- * mfd.c: driver for High Speed UART device of Intel Medfield platform
- *
- * Refer pxa.c, 8250.c and some other drivers in drivers/serial/
- *
- * (C) Copyright 2010 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
- */
-
-/* Notes:
- * 1. DMA channel allocation: 0/1 channel are assigned to port 0,
- * 2/3 chan to port 1, 4/5 chan to port 3. Even number chans
- * are used for RX, odd chans for TX
- *
- * 2. The RI/DSR/DCD/DTR are not pinned out, DCD & DSR are always
- * asserted, only when the HW is reset the DDCD and DDSR will
- * be triggered
- */
-
-#if defined(CONFIG_SERIAL_MFD_HSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/sysrq.h>
-#include <linux/slab.h>
-#include <linux/serial_reg.h>
-#include <linux/circ_buf.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial_core.h>
-#include <linux/serial_mfd.h>
-#include <linux/dma-mapping.h>
-#include <linux/pci.h>
-#include <linux/nmi.h>
-#include <linux/io.h>
-#include <linux/debugfs.h>
-#include <linux/pm_runtime.h>
-
-#define HSU_DMA_BUF_SIZE 2048
-
-#define chan_readl(chan, offset) readl(chan->reg + offset)
-#define chan_writel(chan, offset, val) writel(val, chan->reg + offset)
-
-#define mfd_readl(obj, offset) readl(obj->reg + offset)
-#define mfd_writel(obj, offset, val) writel(val, obj->reg + offset)
-
-static int hsu_dma_enable;
-module_param(hsu_dma_enable, int, 0);
-MODULE_PARM_DESC(hsu_dma_enable,
- "It is a bitmap to set working mode, if bit[x] is 1, then port[x] will work in DMA mode, otherwise in PIO mode.");
-
-struct hsu_dma_buffer {
- u8 *buf;
- dma_addr_t dma_addr;
- u32 dma_size;
- u32 ofs;
-};
-
-struct hsu_dma_chan {
- u32 id;
- enum dma_data_direction dirt;
- struct uart_hsu_port *uport;
- void __iomem *reg;
-};
-
-struct uart_hsu_port {
- struct uart_port port;
- unsigned char ier;
- unsigned char lcr;
- unsigned char mcr;
- unsigned int lsr_break_flag;
- char name[12];
- int index;
- struct device *dev;
-
- struct hsu_dma_chan *txc;
- struct hsu_dma_chan *rxc;
- struct hsu_dma_buffer txbuf;
- struct hsu_dma_buffer rxbuf;
- int use_dma; /* flag for DMA/PIO */
- int running;
- int dma_tx_on;
-};
-
-/* Top level data structure of HSU */
-struct hsu_port {
- void __iomem *reg;
- unsigned long paddr;
- unsigned long iolen;
- u32 irq;
-
- struct uart_hsu_port port[3];
- struct hsu_dma_chan chans[10];
-
- struct dentry *debugfs;
-};
-
-static inline unsigned int serial_in(struct uart_hsu_port *up, int offset)
-{
- unsigned int val;
-
- if (offset > UART_MSR) {
- offset <<= 2;
- val = readl(up->port.membase + offset);
- } else
- val = (unsigned int)readb(up->port.membase + offset);
-
- return val;
-}
-
-static inline void serial_out(struct uart_hsu_port *up, int offset, int value)
-{
- if (offset > UART_MSR) {
- offset <<= 2;
- writel(value, up->port.membase + offset);
- } else {
- unsigned char val = value & 0xff;
- writeb(val, up->port.membase + offset);
- }
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-#define HSU_REGS_BUFSIZE 1024
-
-
-static ssize_t port_show_regs(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct uart_hsu_port *up = file->private_data;
- char *buf;
- u32 len = 0;
- ssize_t ret;
-
- buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL);
- if (!buf)
- return 0;
-
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MFD HSU port[%d] regs:\n", up->index);
-
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "=================================\n");
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "IER: \t\t0x%08x\n", serial_in(up, UART_IER));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "IIR: \t\t0x%08x\n", serial_in(up, UART_IIR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "LCR: \t\t0x%08x\n", serial_in(up, UART_LCR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MCR: \t\t0x%08x\n", serial_in(up, UART_MCR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "LSR: \t\t0x%08x\n", serial_in(up, UART_LSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MSR: \t\t0x%08x\n", serial_in(up, UART_MSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "FOR: \t\t0x%08x\n", serial_in(up, UART_FOR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "PS: \t\t0x%08x\n", serial_in(up, UART_PS));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MUL: \t\t0x%08x\n", serial_in(up, UART_MUL));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "DIV: \t\t0x%08x\n", serial_in(up, UART_DIV));
-
- if (len > HSU_REGS_BUFSIZE)
- len = HSU_REGS_BUFSIZE;
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
- kfree(buf);
- return ret;
-}
-
-static ssize_t dma_show_regs(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- struct hsu_dma_chan *chan = file->private_data;
- char *buf;
- u32 len = 0;
- ssize_t ret;
-
- buf = kzalloc(HSU_REGS_BUFSIZE, GFP_KERNEL);
- if (!buf)
- return 0;
-
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MFD HSU DMA channel [%d] regs:\n", chan->id);
-
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "=================================\n");
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "CR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_CR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "DCR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_DCR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "BSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_BSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "MOTSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_MOTSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0SAR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D0TSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1SAR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D1TSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2SAR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D2TSR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0SAR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3SAR));
- len += snprintf(buf + len, HSU_REGS_BUFSIZE - len,
- "D0TSR: \t\t0x%08x\n", chan_readl(chan, HSU_CH_D3TSR));
-
- if (len > HSU_REGS_BUFSIZE)
- len = HSU_REGS_BUFSIZE;
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
- kfree(buf);
- return ret;
-}
-
-static const struct file_operations port_regs_ops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = port_show_regs,
- .llseek = default_llseek,
-};
-
-static const struct file_operations dma_regs_ops = {
- .owner = THIS_MODULE,
- .open = simple_open,
- .read = dma_show_regs,
- .llseek = default_llseek,
-};
-
-static int hsu_debugfs_init(struct hsu_port *hsu)
-{
- int i;
- char name[32];
-
- hsu->debugfs = debugfs_create_dir("hsu", NULL);
- if (!hsu->debugfs)
- return -ENOMEM;
-
- for (i = 0; i < 3; i++) {
- snprintf(name, sizeof(name), "port_%d_regs", i);
- debugfs_create_file(name, S_IFREG | S_IRUGO,
- hsu->debugfs, (void *)(&hsu->port[i]), &port_regs_ops);
- }
-
- for (i = 0; i < 6; i++) {
- snprintf(name, sizeof(name), "dma_chan_%d_regs", i);
- debugfs_create_file(name, S_IFREG | S_IRUGO,
- hsu->debugfs, (void *)&hsu->chans[i], &dma_regs_ops);
- }
-
- return 0;
-}
-
-static void hsu_debugfs_remove(struct hsu_port *hsu)
-{
- if (hsu->debugfs)
- debugfs_remove_recursive(hsu->debugfs);
-}
-
-#else
-static inline int hsu_debugfs_init(struct hsu_port *hsu)
-{
- return 0;
-}
-
-static inline void hsu_debugfs_remove(struct hsu_port *hsu)
-{
-}
-#endif /* CONFIG_DEBUG_FS */
-
-static void serial_hsu_enable_ms(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
-
- up->ier |= UART_IER_MSI;
- serial_out(up, UART_IER, up->ier);
-}
-
-static void hsu_dma_tx(struct uart_hsu_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- struct hsu_dma_buffer *dbuf = &up->txbuf;
- int count;
-
- /* test_and_set_bit may be better, but anyway it's in lock protected mode */
- if (up->dma_tx_on)
- return;
-
- /* Update the circ buf info */
- xmit->tail += dbuf->ofs;
- xmit->tail &= UART_XMIT_SIZE - 1;
-
- up->port.icount.tx += dbuf->ofs;
- dbuf->ofs = 0;
-
- /* Disable the channel */
- chan_writel(up->txc, HSU_CH_CR, 0x0);
-
- if (!uart_circ_empty(xmit) && !uart_tx_stopped(&up->port)) {
- dma_sync_single_for_device(up->port.dev,
- dbuf->dma_addr,
- dbuf->dma_size,
- DMA_TO_DEVICE);
-
- count = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
- dbuf->ofs = count;
-
- /* Reprogram the channel */
- chan_writel(up->txc, HSU_CH_D0SAR, dbuf->dma_addr + xmit->tail);
- chan_writel(up->txc, HSU_CH_D0TSR, count);
-
- /* Reenable the channel */
- chan_writel(up->txc, HSU_CH_DCR, 0x1
- | (0x1 << 8)
- | (0x1 << 16)
- | (0x1 << 24));
- up->dma_tx_on = 1;
- chan_writel(up->txc, HSU_CH_CR, 0x1);
- }
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-}
-
-/* The buffer is already cache coherent */
-static void hsu_dma_start_rx_chan(struct hsu_dma_chan *rxc,
- struct hsu_dma_buffer *dbuf)
-{
- dbuf->ofs = 0;
-
- chan_writel(rxc, HSU_CH_BSR, 32);
- chan_writel(rxc, HSU_CH_MOTSR, 4);
-
- chan_writel(rxc, HSU_CH_D0SAR, dbuf->dma_addr);
- chan_writel(rxc, HSU_CH_D0TSR, dbuf->dma_size);
- chan_writel(rxc, HSU_CH_DCR, 0x1 | (0x1 << 8)
- | (0x1 << 16)
- | (0x1 << 24) /* timeout bit, see HSU Errata 1 */
- );
- chan_writel(rxc, HSU_CH_CR, 0x3);
-}
-
-/* Protected by spin_lock_irqsave(port->lock) */
-static void serial_hsu_start_tx(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
-
- if (up->use_dma) {
- hsu_dma_tx(up);
- } else if (!(up->ier & UART_IER_THRI)) {
- up->ier |= UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static void serial_hsu_stop_tx(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- struct hsu_dma_chan *txc = up->txc;
-
- if (up->use_dma)
- chan_writel(txc, HSU_CH_CR, 0x0);
- else if (up->ier & UART_IER_THRI) {
- up->ier &= ~UART_IER_THRI;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-/* This is always called in spinlock protected mode, so
- * modify timeout timer is safe here */
-static void hsu_dma_rx(struct uart_hsu_port *up, u32 int_sts,
- unsigned long *flags)
-{
- struct hsu_dma_buffer *dbuf = &up->rxbuf;
- struct hsu_dma_chan *chan = up->rxc;
- struct uart_port *port = &up->port;
- struct tty_port *tport = &port->state->port;
- int count;
-
- /*
- * First need to know how many is already transferred,
- * then check if its a timeout DMA irq, and return
- * the trail bytes out, push them up and reenable the
- * channel
- */
-
- /* Timeout IRQ, need wait some time, see Errata 2 */
- if (int_sts & 0xf00)
- udelay(2);
-
- /* Stop the channel */
- chan_writel(chan, HSU_CH_CR, 0x0);
-
- count = chan_readl(chan, HSU_CH_D0SAR) - dbuf->dma_addr;
- if (!count) {
- /* Restart the channel before we leave */
- chan_writel(chan, HSU_CH_CR, 0x3);
- return;
- }
-
- dma_sync_single_for_cpu(port->dev, dbuf->dma_addr,
- dbuf->dma_size, DMA_FROM_DEVICE);
-
- /*
- * Head will only wrap around when we recycle
- * the DMA buffer, and when that happens, we
- * explicitly set tail to 0. So head will
- * always be greater than tail.
- */
- tty_insert_flip_string(tport, dbuf->buf, count);
- port->icount.rx += count;
-
- dma_sync_single_for_device(up->port.dev, dbuf->dma_addr,
- dbuf->dma_size, DMA_FROM_DEVICE);
-
- /* Reprogram the channel */
- chan_writel(chan, HSU_CH_D0SAR, dbuf->dma_addr);
- chan_writel(chan, HSU_CH_D0TSR, dbuf->dma_size);
- chan_writel(chan, HSU_CH_DCR, 0x1
- | (0x1 << 8)
- | (0x1 << 16)
- | (0x1 << 24) /* timeout bit, see HSU Errata 1 */
- );
- spin_unlock_irqrestore(&up->port.lock, *flags);
- tty_flip_buffer_push(tport);
- spin_lock_irqsave(&up->port.lock, *flags);
-
- chan_writel(chan, HSU_CH_CR, 0x3);
-
-}
-
-static void serial_hsu_stop_rx(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- struct hsu_dma_chan *chan = up->rxc;
-
- if (up->use_dma)
- chan_writel(chan, HSU_CH_CR, 0x2);
- else {
- up->ier &= ~UART_IER_RLSI;
- up->port.read_status_mask &= ~UART_LSR_DR;
- serial_out(up, UART_IER, up->ier);
- }
-}
-
-static inline void receive_chars(struct uart_hsu_port *up, int *status,
- unsigned long *flags)
-{
- unsigned int ch, flag;
- unsigned int max_count = 256;
-
- do {
- ch = serial_in(up, UART_RX);
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE))) {
-
- dev_warn(up->dev, "We really rush into ERR/BI case"
- "status = 0x%02x", *status);
- /* For statistics only */
- if (*status & UART_LSR_BI) {
- *status &= ~(UART_LSR_FE | UART_LSR_PE);
- up->port.icount.brk++;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- goto ignore_char;
- } else if (*status & UART_LSR_PE)
- up->port.icount.parity++;
- else if (*status & UART_LSR_FE)
- up->port.icount.frame++;
- if (*status & UART_LSR_OE)
- up->port.icount.overrun++;
-
- /* Mask off conditions which should be ignored. */
- *status &= up->port.read_status_mask;
-
-#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE
- if (up->port.cons &&
- up->port.cons->index == up->port.line) {
- /* Recover the break flag from console xmit */
- *status |= up->lsr_break_flag;
- up->lsr_break_flag = 0;
- }
-#endif
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- } else if (*status & UART_LSR_PE)
- flag = TTY_PARITY;
- else if (*status & UART_LSR_FE)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(&up->port, ch))
- goto ignore_char;
-
- uart_insert_char(&up->port, *status, UART_LSR_OE, ch, flag);
- ignore_char:
- *status = serial_in(up, UART_LSR);
- } while ((*status & UART_LSR_DR) && max_count--);
-
- spin_unlock_irqrestore(&up->port.lock, *flags);
- tty_flip_buffer_push(&up->port.state->port);
- spin_lock_irqsave(&up->port.lock, *flags);
-}
-
-static void transmit_chars(struct uart_hsu_port *up)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int count;
-
- if (up->port.x_char) {
- serial_out(up, UART_TX, up->port.x_char);
- up->port.icount.tx++;
- up->port.x_char = 0;
- return;
- }
- if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
- serial_hsu_stop_tx(&up->port);
- return;
- }
-
- /* The IRQ is for TX FIFO half-empty */
- count = up->port.fifosize / 2;
-
- do {
- serial_out(up, UART_TX, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- } while (--count > 0);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
- if (uart_circ_empty(xmit))
- serial_hsu_stop_tx(&up->port);
-}
-
-static inline void check_modem_status(struct uart_hsu_port *up)
-{
- int status;
-
- status = serial_in(up, UART_MSR);
-
- if ((status & UART_MSR_ANY_DELTA) == 0)
- return;
-
- if (status & UART_MSR_TERI)
- up->port.icount.rng++;
- if (status & UART_MSR_DDSR)
- up->port.icount.dsr++;
- /* We may only get DDCD when HW init and reset */
- if (status & UART_MSR_DDCD)
- uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
- /* Will start/stop_tx accordingly */
- if (status & UART_MSR_DCTS)
- uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
-
- wake_up_interruptible(&up->port.state->port.delta_msr_wait);
-}
-
-/*
- * This handles the interrupt from one port.
- */
-static irqreturn_t port_irq(int irq, void *dev_id)
-{
- struct uart_hsu_port *up = dev_id;
- unsigned int iir, lsr;
- unsigned long flags;
-
- if (unlikely(!up->running))
- return IRQ_NONE;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (up->use_dma) {
- lsr = serial_in(up, UART_LSR);
- if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE |
- UART_LSR_FE | UART_LSR_OE)))
- dev_warn(up->dev,
- "Got lsr irq while using DMA, lsr = 0x%2x\n",
- lsr);
- check_modem_status(up);
- spin_unlock_irqrestore(&up->port.lock, flags);
- return IRQ_HANDLED;
- }
-
- iir = serial_in(up, UART_IIR);
- if (iir & UART_IIR_NO_INT) {
- spin_unlock_irqrestore(&up->port.lock, flags);
- return IRQ_NONE;
- }
-
- lsr = serial_in(up, UART_LSR);
- if (lsr & UART_LSR_DR)
- receive_chars(up, &lsr, &flags);
- check_modem_status(up);
-
- /* lsr will be renewed during the receive_chars */
- if (lsr & UART_LSR_THRE)
- transmit_chars(up);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
- return IRQ_HANDLED;
-}
-
-static inline void dma_chan_irq(struct hsu_dma_chan *chan)
-{
- struct uart_hsu_port *up = chan->uport;
- unsigned long flags;
- u32 int_sts;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- if (!up->use_dma || !up->running)
- goto exit;
-
- /*
- * No matter what situation, need read clear the IRQ status
- * There is a bug, see Errata 5, HSD 2900918
- */
- int_sts = chan_readl(chan, HSU_CH_SR);
-
- /* Rx channel */
- if (chan->dirt == DMA_FROM_DEVICE)
- hsu_dma_rx(up, int_sts, &flags);
-
- /* Tx channel */
- if (chan->dirt == DMA_TO_DEVICE) {
- chan_writel(chan, HSU_CH_CR, 0x0);
- up->dma_tx_on = 0;
- hsu_dma_tx(up);
- }
-
-exit:
- spin_unlock_irqrestore(&up->port.lock, flags);
- return;
-}
-
-static irqreturn_t dma_irq(int irq, void *dev_id)
-{
- struct hsu_port *hsu = dev_id;
- u32 int_sts, i;
-
- int_sts = mfd_readl(hsu, HSU_GBL_DMAISR);
-
- /* Currently we only have 6 channels may be used */
- for (i = 0; i < 6; i++) {
- if (int_sts & 0x1)
- dma_chan_irq(&hsu->chans[i]);
- int_sts >>= 1;
- }
-
- return IRQ_HANDLED;
-}
-
-static unsigned int serial_hsu_tx_empty(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned long flags;
- unsigned int ret;
-
- spin_lock_irqsave(&up->port.lock, flags);
- ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return ret;
-}
-
-static unsigned int serial_hsu_get_mctrl(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned char status;
- unsigned int ret;
-
- status = serial_in(up, UART_MSR);
-
- ret = 0;
- if (status & UART_MSR_DCD)
- ret |= TIOCM_CAR;
- if (status & UART_MSR_RI)
- ret |= TIOCM_RNG;
- if (status & UART_MSR_DSR)
- ret |= TIOCM_DSR;
- if (status & UART_MSR_CTS)
- ret |= TIOCM_CTS;
- return ret;
-}
-
-static void serial_hsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned char mcr = 0;
-
- if (mctrl & TIOCM_RTS)
- mcr |= UART_MCR_RTS;
- if (mctrl & TIOCM_DTR)
- mcr |= UART_MCR_DTR;
- if (mctrl & TIOCM_OUT1)
- mcr |= UART_MCR_OUT1;
- if (mctrl & TIOCM_OUT2)
- mcr |= UART_MCR_OUT2;
- if (mctrl & TIOCM_LOOP)
- mcr |= UART_MCR_LOOP;
-
- mcr |= up->mcr;
-
- serial_out(up, UART_MCR, mcr);
-}
-
-static void serial_hsu_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
- if (break_state == -1)
- up->lcr |= UART_LCR_SBC;
- else
- up->lcr &= ~UART_LCR_SBC;
- serial_out(up, UART_LCR, up->lcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-/*
- * What special to do:
- * 1. chose the 64B fifo mode
- * 2. start dma or pio depends on configuration
- * 3. we only allocate dma memory when needed
- */
-static int serial_hsu_startup(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned long flags;
-
- pm_runtime_get_sync(up->dev);
-
- /*
- * Clear the FIFO buffers and disable them.
- * (they will be reenabled in set_termios())
- */
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-
- /* Clear the interrupt registers. */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- /* Now, initialize the UART, default is 8n1 */
- serial_out(up, UART_LCR, UART_LCR_WLEN8);
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- up->port.mctrl |= TIOCM_OUT2;
- serial_hsu_set_mctrl(&up->port, up->port.mctrl);
-
- /*
- * Finally, enable interrupts. Note: Modem status interrupts
- * are set via set_termios(), which will be occurring imminently
- * anyway, so we don't enable them here.
- */
- if (!up->use_dma)
- up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE;
- else
- up->ier = 0;
- serial_out(up, UART_IER, up->ier);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /* DMA init */
- if (up->use_dma) {
- struct hsu_dma_buffer *dbuf;
- struct circ_buf *xmit = &port->state->xmit;
-
- up->dma_tx_on = 0;
-
- /* First allocate the RX buffer */
- dbuf = &up->rxbuf;
- dbuf->buf = kzalloc(HSU_DMA_BUF_SIZE, GFP_KERNEL);
- if (!dbuf->buf) {
- up->use_dma = 0;
- goto exit;
- }
- dbuf->dma_addr = dma_map_single(port->dev,
- dbuf->buf,
- HSU_DMA_BUF_SIZE,
- DMA_FROM_DEVICE);
- dbuf->dma_size = HSU_DMA_BUF_SIZE;
-
- /* Start the RX channel right now */
- hsu_dma_start_rx_chan(up->rxc, dbuf);
-
- /* Next init the TX DMA */
- dbuf = &up->txbuf;
- dbuf->buf = xmit->buf;
- dbuf->dma_addr = dma_map_single(port->dev,
- dbuf->buf,
- UART_XMIT_SIZE,
- DMA_TO_DEVICE);
- dbuf->dma_size = UART_XMIT_SIZE;
-
- /* This should not be changed all around */
- chan_writel(up->txc, HSU_CH_BSR, 32);
- chan_writel(up->txc, HSU_CH_MOTSR, 4);
- dbuf->ofs = 0;
- }
-
-exit:
- /* And clear the interrupt registers again for luck. */
- (void) serial_in(up, UART_LSR);
- (void) serial_in(up, UART_RX);
- (void) serial_in(up, UART_IIR);
- (void) serial_in(up, UART_MSR);
-
- up->running = 1;
- return 0;
-}
-
-static void serial_hsu_shutdown(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned long flags;
-
- /* Disable interrupts from this port */
- up->ier = 0;
- serial_out(up, UART_IER, 0);
- up->running = 0;
-
- spin_lock_irqsave(&up->port.lock, flags);
- up->port.mctrl &= ~TIOCM_OUT2;
- serial_hsu_set_mctrl(&up->port, up->port.mctrl);
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- /* Disable break condition and FIFOs */
- serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
- serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
- UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT);
- serial_out(up, UART_FCR, 0);
-
- pm_runtime_put(up->dev);
-}
-
-static void
-serial_hsu_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- unsigned char cval, fcr = 0;
- unsigned long flags;
- unsigned int baud, quot;
- u32 ps, mul;
-
- switch (termios->c_cflag & CSIZE) {
- case CS5:
- cval = UART_LCR_WLEN5;
- break;
- case CS6:
- cval = UART_LCR_WLEN6;
- break;
- case CS7:
- cval = UART_LCR_WLEN7;
- break;
- default:
- case CS8:
- cval = UART_LCR_WLEN8;
- break;
- }
-
- /* CMSPAR isn't supported by this driver */
- termios->c_cflag &= ~CMSPAR;
-
- if (termios->c_cflag & CSTOPB)
- cval |= UART_LCR_STOP;
- if (termios->c_cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(termios->c_cflag & PARODD))
- cval |= UART_LCR_EPAR;
-
- /*
- * The base clk is 50Mhz, and the baud rate come from:
- * baud = 50M * MUL / (DIV * PS * DLAB)
- *
- * For those basic low baud rate we can get the direct
- * scalar from 2746800, like 115200 = 2746800/24. For those
- * higher baud rate, we handle them case by case, mainly by
- * adjusting the MUL/PS registers, and DIV register is kept
- * as default value 0x3d09 to make things simple
- */
- baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
-
- quot = 1;
- ps = 0x10;
- mul = 0x3600;
- switch (baud) {
- case 3500000:
- mul = 0x3345;
- ps = 0xC;
- break;
- case 1843200:
- mul = 0x2400;
- break;
- case 3000000:
- case 2500000:
- case 2000000:
- case 1500000:
- case 1000000:
- case 500000:
- /* mul/ps/quot = 0x9C4/0x10/0x1 will make a 500000 bps */
- mul = baud / 500000 * 0x9C4;
- break;
- default:
- /* Use uart_get_divisor to get quot for other baud rates */
- quot = 0;
- }
-
- if (!quot)
- quot = uart_get_divisor(port, baud);
-
- if ((up->port.uartclk / quot) < (2400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_1B;
- else if ((up->port.uartclk / quot) < (230400 * 16))
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_16B;
- else
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_HSU_64_32B;
-
- fcr |= UART_FCR_HSU_64B_FIFO;
-
- /*
- * Ok, we're now changing the port state. Do it with
- * interrupts disabled.
- */
- spin_lock_irqsave(&up->port.lock, flags);
-
- /* Update the per-port timeout */
- uart_update_timeout(port, termios->c_cflag, baud);
-
- up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (termios->c_iflag & INPCK)
- up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
- up->port.read_status_mask |= UART_LSR_BI;
-
- /* Characters to ignore */
- up->port.ignore_status_mask = 0;
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
- if (termios->c_iflag & IGNBRK) {
- up->port.ignore_status_mask |= UART_LSR_BI;
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (termios->c_iflag & IGNPAR)
- up->port.ignore_status_mask |= UART_LSR_OE;
- }
-
- /* Ignore all characters if CREAD is not set */
- if ((termios->c_cflag & CREAD) == 0)
- up->port.ignore_status_mask |= UART_LSR_DR;
-
- /*
- * CTS flow control flag and modem status interrupts, disable
- * MSI by default
- */
- up->ier &= ~UART_IER_MSI;
- if (UART_ENABLE_MS(&up->port, termios->c_cflag))
- up->ier |= UART_IER_MSI;
-
- serial_out(up, UART_IER, up->ier);
-
- if (termios->c_cflag & CRTSCTS)
- up->mcr |= UART_MCR_AFE | UART_MCR_RTS;
- else
- up->mcr &= ~UART_MCR_AFE;
-
- serial_out(up, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
- serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
- serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
- serial_out(up, UART_LCR, cval); /* reset DLAB */
- serial_out(up, UART_MUL, mul); /* set MUL */
- serial_out(up, UART_PS, ps); /* set PS */
- up->lcr = cval; /* Save LCR */
- serial_hsu_set_mctrl(&up->port, up->port.mctrl);
- serial_out(up, UART_FCR, fcr);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static void
-serial_hsu_pm(struct uart_port *port, unsigned int state,
- unsigned int oldstate)
-{
-}
-
-static void serial_hsu_release_port(struct uart_port *port)
-{
-}
-
-static int serial_hsu_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void serial_hsu_config_port(struct uart_port *port, int flags)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- up->port.type = PORT_MFD;
-}
-
-static int
-serial_hsu_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- /* We don't want the core code to modify any port params */
- return -EINVAL;
-}
-
-static const char *
-serial_hsu_type(struct uart_port *port)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
- return up->name;
-}
-
-/* Mainly for uart console use */
-static struct uart_hsu_port *serial_hsu_ports[3];
-static struct uart_driver serial_hsu_reg;
-
-#ifdef CONFIG_SERIAL_MFD_HSU_CONSOLE
-
-#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
-
-/* Wait for transmitter & holding register to empty */
-static inline void wait_for_xmitr(struct uart_hsu_port *up)
-{
- unsigned int status, tmout = 1000;
-
- /* Wait up to 1ms for the character to be sent. */
- do {
- status = serial_in(up, UART_LSR);
-
- if (status & UART_LSR_BI)
- up->lsr_break_flag = UART_LSR_BI;
-
- if (--tmout == 0)
- break;
- udelay(1);
- } while (!(status & BOTH_EMPTY));
-
- /* Wait up to 1s for flow control if necessary */
- if (up->port.flags & UPF_CONS_FLOW) {
- tmout = 1000000;
- while (--tmout &&
- ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
- udelay(1);
- }
-}
-
-static void serial_hsu_console_putchar(struct uart_port *port, int ch)
-{
- struct uart_hsu_port *up =
- container_of(port, struct uart_hsu_port, port);
-
- wait_for_xmitr(up);
- serial_out(up, UART_TX, ch);
-}
-
-/*
- * Print a string to the serial port trying not to disturb
- * any possible real use of the port...
- *
- * The console_lock must be held when we get here.
- */
-static void
-serial_hsu_console_write(struct console *co, const char *s, unsigned int count)
-{
- struct uart_hsu_port *up = serial_hsu_ports[co->index];
- unsigned long flags;
- unsigned int ier;
- int locked = 1;
-
- touch_nmi_watchdog();
-
- local_irq_save(flags);
- if (up->port.sysrq)
- locked = 0;
- else if (oops_in_progress) {
- locked = spin_trylock(&up->port.lock);
- } else
- spin_lock(&up->port.lock);
-
- /* First save the IER then disable the interrupts */
- ier = serial_in(up, UART_IER);
- serial_out(up, UART_IER, 0);
-
- uart_console_write(&up->port, s, count, serial_hsu_console_putchar);
-
- /*
- * Finally, wait for transmitter to become empty
- * and restore the IER
- */
- wait_for_xmitr(up);
- serial_out(up, UART_IER, ier);
-
- if (locked)
- spin_unlock(&up->port.lock);
- local_irq_restore(flags);
-}
-
-static struct console serial_hsu_console;
-
-static int __init
-serial_hsu_console_setup(struct console *co, char *options)
-{
- struct uart_hsu_port *up;
- int baud = 115200;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if (co->index == -1 || co->index >= serial_hsu_reg.nr)
- co->index = 0;
- up = serial_hsu_ports[co->index];
- if (!up)
- return -ENODEV;
-
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(&up->port, co, baud, parity, bits, flow);
-}
-
-static struct console serial_hsu_console = {
- .name = "ttyMFD",
- .write = serial_hsu_console_write,
- .device = uart_console_device,
- .setup = serial_hsu_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &serial_hsu_reg,
-};
-
-#define SERIAL_HSU_CONSOLE (&serial_hsu_console)
-#else
-#define SERIAL_HSU_CONSOLE NULL
-#endif
-
-static struct uart_ops serial_hsu_pops = {
- .tx_empty = serial_hsu_tx_empty,
- .set_mctrl = serial_hsu_set_mctrl,
- .get_mctrl = serial_hsu_get_mctrl,
- .stop_tx = serial_hsu_stop_tx,
- .start_tx = serial_hsu_start_tx,
- .stop_rx = serial_hsu_stop_rx,
- .enable_ms = serial_hsu_enable_ms,
- .break_ctl = serial_hsu_break_ctl,
- .startup = serial_hsu_startup,
- .shutdown = serial_hsu_shutdown,
- .set_termios = serial_hsu_set_termios,
- .pm = serial_hsu_pm,
- .type = serial_hsu_type,
- .release_port = serial_hsu_release_port,
- .request_port = serial_hsu_request_port,
- .config_port = serial_hsu_config_port,
- .verify_port = serial_hsu_verify_port,
-};
-
-static struct uart_driver serial_hsu_reg = {
- .owner = THIS_MODULE,
- .driver_name = "MFD serial",
- .dev_name = "ttyMFD",
- .major = TTY_MAJOR,
- .minor = 128,
- .nr = 3,
- .cons = SERIAL_HSU_CONSOLE,
-};
-
-#ifdef CONFIG_PM
-static int serial_hsu_suspend(struct pci_dev *pdev, pm_message_t state)
-{
- void *priv = pci_get_drvdata(pdev);
- struct uart_hsu_port *up;
-
- /* Make sure this is not the internal dma controller */
- if (priv && (pdev->device != 0x081E)) {
- up = priv;
- uart_suspend_port(&serial_hsu_reg, &up->port);
- }
-
- pci_save_state(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
- return 0;
-}
-
-static int serial_hsu_resume(struct pci_dev *pdev)
-{
- void *priv = pci_get_drvdata(pdev);
- struct uart_hsu_port *up;
- int ret;
-
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
-
- ret = pci_enable_device(pdev);
- if (ret)
- dev_warn(&pdev->dev,
- "HSU: can't re-enable device, try to continue\n");
-
- if (priv && (pdev->device != 0x081E)) {
- up = priv;
- uart_resume_port(&serial_hsu_reg, &up->port);
- }
- return 0;
-}
-
-static int serial_hsu_runtime_idle(struct device *dev)
-{
- pm_schedule_suspend(dev, 500);
- return -EBUSY;
-}
-
-static int serial_hsu_runtime_suspend(struct device *dev)
-{
- return 0;
-}
-
-static int serial_hsu_runtime_resume(struct device *dev)
-{
- return 0;
-}
-#else
-#define serial_hsu_suspend NULL
-#define serial_hsu_resume NULL
-#define serial_hsu_runtime_idle NULL
-#define serial_hsu_runtime_suspend NULL
-#define serial_hsu_runtime_resume NULL
-#endif
-
-static const struct dev_pm_ops serial_hsu_pm_ops = {
- .runtime_suspend = serial_hsu_runtime_suspend,
- .runtime_resume = serial_hsu_runtime_resume,
- .runtime_idle = serial_hsu_runtime_idle,
-};
-
-/* temp global pointer before we settle down on using one or four PCI dev */
-static struct hsu_port *phsu;
-
-static int serial_hsu_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
- struct uart_hsu_port *uport;
- int index, ret;
-
- printk(KERN_INFO "HSU: found PCI Serial controller(ID: %04x:%04x)\n",
- pdev->vendor, pdev->device);
-
- switch (pdev->device) {
- case 0x081B:
- index = 0;
- break;
- case 0x081C:
- index = 1;
- break;
- case 0x081D:
- index = 2;
- break;
- case 0x081E:
- /* internal DMA controller */
- index = 3;
- break;
- default:
- dev_err(&pdev->dev, "HSU: out of index!");
- return -ENODEV;
- }
-
- ret = pci_enable_device(pdev);
- if (ret)
- return ret;
-
- if (index == 3) {
- /* DMA controller */
- ret = request_irq(pdev->irq, dma_irq, 0, "hsu_dma", phsu);
- if (ret) {
- dev_err(&pdev->dev, "can not get IRQ\n");
- goto err_disable;
- }
- pci_set_drvdata(pdev, phsu);
- } else {
- /* UART port 0~2 */
- uport = &phsu->port[index];
- uport->port.irq = pdev->irq;
- uport->port.dev = &pdev->dev;
- uport->dev = &pdev->dev;
-
- ret = request_irq(pdev->irq, port_irq, 0, uport->name, uport);
- if (ret) {
- dev_err(&pdev->dev, "can not get IRQ\n");
- goto err_disable;
- }
- uart_add_one_port(&serial_hsu_reg, &uport->port);
-
- pci_set_drvdata(pdev, uport);
- }
-
- pm_runtime_put_noidle(&pdev->dev);
- pm_runtime_allow(&pdev->dev);
-
- return 0;
-
-err_disable:
- pci_disable_device(pdev);
- return ret;
-}
-
-static void hsu_global_init(void)
-{
- struct hsu_port *hsu;
- struct uart_hsu_port *uport;
- struct hsu_dma_chan *dchan;
- int i, ret;
-
- hsu = kzalloc(sizeof(struct hsu_port), GFP_KERNEL);
- if (!hsu)
- return;
-
- /* Get basic io resource and map it */
- hsu->paddr = 0xffa28000;
- hsu->iolen = 0x1000;
-
- if (!(request_mem_region(hsu->paddr, hsu->iolen, "HSU global")))
- pr_warn("HSU: error in request mem region\n");
-
- hsu->reg = ioremap_nocache((unsigned long)hsu->paddr, hsu->iolen);
- if (!hsu->reg) {
- pr_err("HSU: error in ioremap\n");
- ret = -ENOMEM;
- goto err_free_region;
- }
-
- /* Initialise the 3 UART ports */
- uport = hsu->port;
- for (i = 0; i < 3; i++) {
- uport->port.type = PORT_MFD;
- uport->port.iotype = UPIO_MEM;
- uport->port.mapbase = (resource_size_t)hsu->paddr
- + HSU_PORT_REG_OFFSET
- + i * HSU_PORT_REG_LENGTH;
- uport->port.membase = hsu->reg + HSU_PORT_REG_OFFSET
- + i * HSU_PORT_REG_LENGTH;
-
- sprintf(uport->name, "hsu_port%d", i);
- uport->port.fifosize = 64;
- uport->port.ops = &serial_hsu_pops;
- uport->port.line = i;
- uport->port.flags = UPF_IOREMAP;
- /* set the scalable maxim support rate to 2746800 bps */
- uport->port.uartclk = 115200 * 24 * 16;
-
- uport->running = 0;
- uport->txc = &hsu->chans[i * 2];
- uport->rxc = &hsu->chans[i * 2 + 1];
-
- serial_hsu_ports[i] = uport;
- uport->index = i;
-
- if (hsu_dma_enable & (1<<i))
- uport->use_dma = 1;
- else
- uport->use_dma = 0;
-
- uport++;
- }
-
- /* Initialise 6 dma channels */
- dchan = hsu->chans;
- for (i = 0; i < 6; i++) {
- dchan->id = i;
- dchan->dirt = (i & 0x1) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
- dchan->uport = &hsu->port[i/2];
- dchan->reg = hsu->reg + HSU_DMA_CHANS_REG_OFFSET +
- i * HSU_DMA_CHANS_REG_LENGTH;
-
- dchan++;
- }
-
- phsu = hsu;
- hsu_debugfs_init(hsu);
- return;
-
-err_free_region:
- release_mem_region(hsu->paddr, hsu->iolen);
- kfree(hsu);
- return;
-}
-
-static void serial_hsu_remove(struct pci_dev *pdev)
-{
- void *priv = pci_get_drvdata(pdev);
- struct uart_hsu_port *up;
-
- if (!priv)
- return;
-
- pm_runtime_forbid(&pdev->dev);
- pm_runtime_get_noresume(&pdev->dev);
-
- /* For port 0/1/2, priv is the address of uart_hsu_port */
- if (pdev->device != 0x081E) {
- up = priv;
- uart_remove_one_port(&serial_hsu_reg, &up->port);
- }
-
- free_irq(pdev->irq, priv);
- pci_disable_device(pdev);
-}
-
-/* First 3 are UART ports, and the 4th is the DMA */
-static const struct pci_device_id pci_ids[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081B) },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081C) },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081D) },
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081E) },
- {},
-};
-
-static struct pci_driver hsu_pci_driver = {
- .name = "HSU serial",
- .id_table = pci_ids,
- .probe = serial_hsu_probe,
- .remove = serial_hsu_remove,
- .suspend = serial_hsu_suspend,
- .resume = serial_hsu_resume,
- .driver = {
- .pm = &serial_hsu_pm_ops,
- },
-};
-
-static int __init hsu_pci_init(void)
-{
- int ret;
-
- hsu_global_init();
-
- ret = uart_register_driver(&serial_hsu_reg);
- if (ret)
- return ret;
-
- return pci_register_driver(&hsu_pci_driver);
-}
-
-static void __exit hsu_pci_exit(void)
-{
- pci_unregister_driver(&hsu_pci_driver);
- uart_unregister_driver(&serial_hsu_reg);
-
- hsu_debugfs_remove(phsu);
-
- kfree(phsu);
-}
-
-module_init(hsu_pci_init);
-module_exit(hsu_pci_exit);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DEVICE_TABLE(pci, pci_ids);
projects / firefly-linux-kernel-4.4.55.git / commitdiff