1 #include <linux/spinlock.h>
2 #include "mantis_common.h"
4 struct mantis_uart_params {
5 enum mantis_baud baud_rate;
6 enum mantis_parity parity;
9 #define UART_MAX_BUF 16
11 int mantis_uart_read(struct mantis_pci *mantis, u8 *data)
13 struct mantis_hwconfig *config = mantis->hwconfig;
18 for (i = 0; i < (config->bytes + 1); i++) {
20 if (stat & MANTIS_UART_RXFIFO_FULL) {
21 dprintk(verbose, MANTIS_ERROR, 1, "RX Fifo FULL");
23 data[i] = mmread(MANTIS_UART_RXD) & 0x3f;
25 stat = mmread(MANTIS_UART_STAT);
27 dprintk(verbose, MANTIS_DEBUG, 1, "Reading ... <%02x>", data[i] & 0x3f);
29 if (data[i] & (1 << 7)) {
30 dprintk(verbose, MANTIS_ERROR, 1, "UART framing error");
33 if (data[i] & (1 << 6)) {
34 dprintk(verbose, MANTIS_ERROR, 1, "UART parity error");
42 static void mantis_uart_work(struct work_struct *work)
44 struct mantis_pci *mantis = container_of(work, struct mantis_pci, uart_work);
45 struct mantis_hwconfig *config = mantis->hwconfig;
49 dprintk(verbose, MANTIS_DEBUG, 1, "UART read");
50 mantis_uart_read(mantis, buf);
52 dprintk(verbose, MANTIS_DEBUG, 1, "UART: ");
53 for (i = 0; i < (config->bytes + 1); i++)
54 dprintk(verbose, MANTIS_DEBUG, 0, "<%02x> ", buf[i]);
56 dprintk(verbose, MANTIS_DEBUG, 0, "\n");
59 static int mantis_uart_setup(struct mantis_pci *mantis,
60 struct mantis_uart_params *params)
62 char* rates[] = { "B_9600", "B_19200", "B_38400", "B_57600", "B_115200" };
63 char* parity[] = { "NONE", "ODD", "EVEN" };
67 dprintk(verbose, MANTIS_DEBUG, 1, "Set Parity <%s> Baud Rate <%s>",
68 parity[params->parity],
69 rates[params->baud_rate]);
71 mmwrite((mmread(MANTIS_UART_CTL) | (params->parity & 0x3)), MANTIS_UART_CTL);
73 reg = mmread(MANTIS_UART_BAUD);
75 switch (params->baud_rate) {
76 case MANTIS_BAUD_9600:
79 case MANTIS_BAUD_19200:
82 case MANTIS_BAUD_38400:
85 case MANTIS_BAUD_57600:
88 case MANTIS_BAUD_115200:
95 mmwrite(reg, MANTIS_UART_BAUD);
100 int mantis_uart_init(struct mantis_pci *mantis)
102 struct mantis_hwconfig *config = mantis->hwconfig;
103 struct mantis_uart_params params;
105 dprintk(verbose, MANTIS_DEBUG, 1, "Initializing UART ..");
106 /* default parity: */
107 params.baud_rate = config->baud_rate;
108 params.parity = config->parity;
110 init_waitqueue_head(&mantis->uart_wq);
111 spin_lock_init(&mantis->uart_lock);
113 INIT_WORK(&mantis->uart_work, mantis_uart_work);
115 /* disable interrupt */
116 mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);
118 mantis_uart_setup(mantis, ¶ms);
121 mmwrite((mmread(MANTIS_UART_BAUD) | (config->bytes << 8)), MANTIS_UART_BAUD);
124 mmwrite((mmread(MANTIS_UART_CTL) | MANTIS_UART_RXFLUSH), MANTIS_UART_CTL);
126 /* enable interrupt */
127 mmwrite(mmread(MANTIS_INT_MASK) | 0x800, MANTIS_INT_MASK);
128 mmwrite(mmread(MANTIS_UART_CTL) | MANTIS_UART_RXINT, MANTIS_UART_CTL);
130 schedule_work(&mantis->uart_work);
135 void mantis_uart_exit(struct mantis_pci *mantis)
137 /* disable interrupt */
138 mmwrite(mmread(MANTIS_UART_CTL) & 0xffef, MANTIS_UART_CTL);