This is the version of the driver modified by TMI to support setting of the

[cp210x.git] / examples / cpmfg.c

diff --git a/examples/cpmfg.c b/examples/cpmfg.c
new file mode 100644 (file)
index 0000000..ed8524a
--- /dev/null
+++ b/examples/cpmfg.c
@@ -0,0 +1,159 @@
+/**
+ * cpcfg.c
+ *
+ * Configure the USB descriptor and GPIO configurations for a cp2103-equipped
+ * device.
+ */
+
+#include <netinet/in.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#define VID    0x10c4
+#define PID    0xea60
+
+/* CP2103 ioctls */
+#define IOCTL_GPIOGET          0x8000  /* Get gpio bits */
+#define IOCTL_GPIOSET          0x8001  /* Set gpio bits */
+#define IOCTL_GPIOBIC          0x8002  /* Clear specific gpio bit(s) */
+#define IOCTL_GPIOBIS          0x8003  /* Set specific gpio bit(s) */
+
+/* CP210x ioctls principally used during initial device configuration */
+#define IOCTL_DEVICERESET      0x8004  /* Reset the cp210x */
+#define IOCTL_PORTCONFGET      0x8005  /* Get port configuration */
+#define IOCTL_PORTCONFSET      0x8006  /* Set port configuration */
+#define IOCTL_SETVID           0x8007  /* Set vendor id */
+#define IOCTL_SETPID           0x8008  /* Set product id */
+#define IOCTL_SETMFG           0x8009  /* Set manufacturer string */
+#define IOCTL_SETPRODUCT       0x800a  /* Set product string */
+#define IOCTL_SETSERIAL                0x800b  /* Set serial number string */
+#define IOCTL_SETDEVVER                0x800c  /* set device version id */
+/* FIXME: where is IOCTL_SETMFG? */
+
+/* CP2103 GPIO */
+#define GPIO_0         0x01
+#define GPIO_1         0x02
+#define GPIO_2         0x04
+#define GPIO_3         0x08
+#define GPIO_MASK      (GPIO_0|GPIO_1|GPIO_2|GPIO_3)
+
+/* Port config definitions */
+typedef struct {
+    uint16_t mode;             /* Push-pull = 1, Open-drain = 0 */
+    uint16_t lowPower;
+    uint16_t latch;            /* Logic high = 1, Logic low = 0 */
+} cp2101_port_state_t;
+
+typedef struct {
+    cp2101_port_state_t reset;
+    cp2101_port_state_t suspend;
+    uint8_t enhancedFxn;
+} cp2101_port_config_t;
+
+#define PORT_CONFIG_LEN        13      /* Because sizeof() will pad to full words */
+
+/* Used to pass variable sized buffers between user and kernel space (ioctls) */
+typedef struct {
+       char* buf;
+       size_t len;
+} cp210x_buffer_t;
+
+void exit(int);
+
+int cpConnect(char* device)
+{
+    int ret, ioval;
+    int fd = open(device, O_RDWR);
+    if (fd < 0) {
+       fprintf(stderr, "cannot open %s\n", device);
+       exit(1);
+    }
+    printf("%s opened\n", device);
+    return fd;
+}
+
+void cpDisconnect(int fd)
+{
+    if (fd >= 0)
+       close(fd);
+}
+
+void cpSetStr(int fd, unsigned int ioctlno, char* string, size_t len)
+{
+    int ret;
+    cp210x_buffer_t buf = { buf: string, len: len };
+
+    ret = ioctl(fd, ioctlno, &buf);
+    if (ret) {
+       fprintf(stderr, "failed to set via ioctl 0x%04x, err %d\n", ioctlno,
+               ret);
+       exit(1);
+    }
+}
+
+void cpSetLeds(int fd)
+{
+    int ret;
+    cp2101_port_config_t config;
+
+    /* Read the current port configuration */
+    if ((ret = ioctl(fd, IOCTL_PORTCONFGET, &config))) {
+       fprintf(stderr, "portconfget ioctl failed %d\n", ret);
+       exit(1);
+    }
+
+    /* Set the current port configuration; turn on GPIO_0 and GPIO_1 to get
+     * activity LEDs.  GPIO_2 and GPIO_3 are set for 'regular' gpio.
+     */
+    config.reset.mode &= ~0x0300;
+    config.suspend.mode &= ~0x0300;
+    config.reset.latch |= 0x0300;
+    config.enhancedFxn |= 0x03;
+    config.enhancedFxn &= ~0x10; /* turn off weak pullups */
+    if ((ret = ioctl(fd, IOCTL_PORTCONFSET, &config))) {
+       fprintf(stderr, "portconfset ioctl failed %d\n", ret);
+       exit(1);
+    }
+}
+
+void cpReset(int fd)
+{
+    int ret;
+
+    /* Reset the part */
+    if ((ret = ioctl(fd, IOCTL_DEVICERESET, 0))) {
+       fprintf(stderr, "device reset ioctl %d\n", ret);
+       exit(1);
+    }
+}
+
+int main(int argc, char* argv[])
+{
+    /* char newmfg[255] = "Company Name"; */
+    char newprod[255] = "CompanyName ";
+    char newsn[255];
+    int fd;
+
+    if (argc != 4) {
+      fprintf(stderr, "usage: %s <tty> <part#> <sn#>\n", argv[0]);
+      exit(1);
+    }
+
+    strcat(newprod, argv[2]);
+    strcpy(newsn, argv[3]);
+    fd = cpConnect(argv[1]);
+    /* SiLabs doesn't allow set of mfg string on cp210x.
+     * cpSetStr(fd, IOCTL_SETMFG, newmfg, strlen(newmfg));
+     */
+    cpSetStr(fd, IOCTL_SETPRODUCT, newprod, strlen(newprod));
+    cpSetStr(fd, IOCTL_SETSERIAL, newsn, strlen(newsn));
+    cpSetLeds(fd);
+    cpReset(fd);
+    cpDisconnect(fd);
+    printf("done\n");
+    return 0;
+}