2009-12-04 15:41:11 +07:00
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#include <linux/kernel.h>
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2009-12-04 15:39:57 +07:00
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#include <linux/spinlock.h>
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2009-12-04 15:41:11 +07:00
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#include <asm/irq.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include "dmxdev.h"
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#include "dvbdev.h"
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#include "dvb_demux.h"
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#include "dvb_frontend.h"
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#include "dvb_net.h"
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2009-12-04 15:39:57 +07:00
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#include "mantis_common.h"
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2009-12-04 15:41:11 +07:00
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#include "mantis_reg.h"
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#include "mantis_uart.h"
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2009-12-04 15:39:57 +07:00
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struct mantis_uart_params {
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enum mantis_baud baud_rate;
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enum mantis_parity parity;
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};
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#define UART_MAX_BUF 16
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int mantis_uart_read(struct mantis_pci *mantis, u8 *data)
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{
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struct mantis_hwconfig *config = mantis->hwconfig;
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u32 stat, i;
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unsigned long flags;
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/* get data */
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for (i = 0; i < (config->bytes + 1); i++) {
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if (stat & MANTIS_UART_RXFIFO_FULL) {
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_ERROR, 1, "RX Fifo FULL");
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2009-12-04 15:39:57 +07:00
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}
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data[i] = mmread(MANTIS_UART_RXD) & 0x3f;
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stat = mmread(MANTIS_UART_STAT);
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 1, "Reading ... <%02x>", data[i] & 0x3f);
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2009-12-04 15:39:57 +07:00
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if (data[i] & (1 << 7)) {
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_ERROR, 1, "UART framing error");
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2009-12-04 15:39:57 +07:00
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return -EINVAL;
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}
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if (data[i] & (1 << 6)) {
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_ERROR, 1, "UART parity error");
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2009-12-04 15:39:57 +07:00
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return -EINVAL;
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}
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}
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return 0;
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}
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static void mantis_uart_work(struct work_struct *work)
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{
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struct mantis_pci *mantis = container_of(work, struct mantis_pci, uart_work);
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struct mantis_hwconfig *config = mantis->hwconfig;
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u8 buf[16];
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int i;
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 1, "UART read");
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2009-12-04 15:39:57 +07:00
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mantis_uart_read(mantis, buf);
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 1, "UART: ");
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2009-12-04 15:39:57 +07:00
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for (i = 0; i < (config->bytes + 1); i++)
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 0, "<%02x> ", buf[i]);
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2009-12-04 15:39:57 +07:00
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 0, "\n");
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2009-12-04 15:39:57 +07:00
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}
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static int mantis_uart_setup(struct mantis_pci *mantis,
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struct mantis_uart_params *params)
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{
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char* rates[] = { "B_9600", "B_19200", "B_38400", "B_57600", "B_115200" };
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char* parity[] = { "NONE", "ODD", "EVEN" };
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u32 reg;
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 1, "Set Parity <%s> Baud Rate <%s>",
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2009-12-04 15:39:57 +07:00
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parity[params->parity],
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rates[params->baud_rate]);
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mmwrite((mmread(MANTIS_UART_CTL) | (params->parity & 0x3)), MANTIS_UART_CTL);
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reg = mmread(MANTIS_UART_BAUD);
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switch (params->baud_rate) {
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case MANTIS_BAUD_9600:
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reg |= 0xd8;
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break;
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case MANTIS_BAUD_19200:
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reg |= 0x6c;
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break;
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case MANTIS_BAUD_38400:
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reg |= 0x36;
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break;
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case MANTIS_BAUD_57600:
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reg |= 0x23;
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break;
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case MANTIS_BAUD_115200:
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reg |= 0x11;
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break;
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default:
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return -EINVAL;
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}
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mmwrite(reg, MANTIS_UART_BAUD);
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return 0;
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}
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int mantis_uart_init(struct mantis_pci *mantis)
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{
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struct mantis_hwconfig *config = mantis->hwconfig;
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struct mantis_uart_params params;
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2009-12-04 15:41:11 +07:00
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dprintk(MANTIS_DEBUG, 1, "Initializing UART ..");
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2009-12-04 15:39:57 +07:00
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/* default parity: */
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params.baud_rate = config->baud_rate;
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params.parity = config->parity;
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init_waitqueue_head(&mantis->uart_wq);
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spin_lock_init(&mantis->uart_lock);
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INIT_WORK(&mantis->uart_work, mantis_uart_work);
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/* disable interrupt */
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mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);
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mantis_uart_setup(mantis, ¶ms);
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/* default 1 byte */
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mmwrite((mmread(MANTIS_UART_BAUD) | (config->bytes << 8)), MANTIS_UART_BAUD);
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/* flush buffer */
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mmwrite((mmread(MANTIS_UART_CTL) | MANTIS_UART_RXFLUSH), MANTIS_UART_CTL);
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/* enable interrupt */
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mmwrite(mmread(MANTIS_INT_MASK) | 0x800, MANTIS_INT_MASK);
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mmwrite(mmread(MANTIS_UART_CTL) | MANTIS_UART_RXINT, MANTIS_UART_CTL);
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schedule_work(&mantis->uart_work);
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return 0;
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}
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2009-12-04 15:41:11 +07:00
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EXPORT_SYMBOL_GPL(mantis_uart_init);
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2009-12-04 15:39:57 +07:00
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void mantis_uart_exit(struct mantis_pci *mantis)
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{
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/* disable interrupt */
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mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);
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}
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2009-12-04 15:41:11 +07:00
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EXPORT_SYMBOL_GPL(mantis_uart_exit);
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