Changeset c1a8ae52 in mainline for uspace/srv/drivers/isa/isa.c

Timestamp:

2010-04-16T14:03:56Z (14 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

5dc9622

Parents:

cd31ed8

Message:

ISA bus - parts of child device pseudo enumeration (enumeration of legacy devices found in configuration file)

File:

• uspace/srv/drivers/isa/isa.c (modified) (4 diffs)

uspace/srv/drivers/isa/isa.c

@@ -45 +45 @@
 #include <ctype.h>
 #include <macros.h>
+#include <malloc.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <sys/stat.h>
 
 #include <driver.h>
@@ -51 +55 @@
 
 #define NAME "isa"
+#define CHILD_DEV_CONF_PATH "/srv/drivers/isa/isa.dev"
 
 static bool isa_add_device(device_t *dev);
@@ -67 +72 @@
 };
 
+typedef struct isa_child_data {
+        hw_resource_list_t hw_resources;        
+} isa_child_data_t;
+
+
+static isa_child_data_t * create_isa_child_data() 
+{
+         isa_child_data_t *data = (isa_child_data_t *) malloc(sizeof(isa_child_data_t));
+         if (NULL != data) {
+                 memset(data, 0, sizeof(isa_child_data_t));
+         }
+         return data;   
+}
+
+static device_t * create_isa_child_dev()
+{
+        device_t *dev = create_device();
+        if (NULL == dev) {
+                return NULL;
+        }
+        isa_child_data_t *data = create_isa_child_data();
+        if (NULL == data) {
+                delete_device(dev);
+                return NULL;
+        }
+        
+        dev->driver_data = data;
+        return dev;
+}
+
+static char * read_dev_conf(const char *conf_path)
+{
+        printf(NAME ": read_dev_conf conf_path = %s.\n", conf_path);
+                
+        bool suc = false;       
+        char *buf = NULL;
+        bool opened = false;
+        int fd;         
+        off_t len = 0;
+        
+        fd = open(conf_path, O_RDONLY);
+        if (fd < 0) {
+                printf(NAME ": unable to open %s\n", conf_path);
+                goto cleanup;
+        } 
+        opened = true;  
+        
+        len = lseek(fd, 0, SEEK_END);
+        lseek(fd, 0, SEEK_SET); 
+        if (len == 0) {
+                printf(NAME ": read_dev_conf error: configuration file '%s' is empty.\n", conf_path);
+                goto cleanup;           
+        }
+        
+        buf = malloc(len + 1);
+        if (buf == NULL) {
+                printf(NAME ": read_dev_conf error: memory allocation failed.\n");
+                goto cleanup;
+        }       
+        
+        if (0 >= read(fd, buf, len)) {
+                printf(NAME ": read_dev_conf error: unable to read file '%s'.\n", conf_path);
+                goto cleanup;
+        }
+        buf[len] = 0;
+        
+        suc = true;
+        
+cleanup:
+        
+        if (!suc && NULL != buf) {
+                free(buf);      
+                buf = NULL;
+        }
+        
+        if(opened) {
+                close(fd);      
+        }
+        
+        return buf;     
+}
+
+static char * str_get_line(char *str) {
+        return strtok(str, "\n");
+}
+
+
+static bool line_empty(const char *line)
+{
+        while (NULL != line && 0 != *line) {
+                if(!isspace(*line)) {
+                        return false;
+                }               
+                line++;         
+        }       
+        return true;    
+}
+
+static char * get_device_name(char *line) {
+        // skip leading spaces
+        while (0 != *line && isspace(*line)) {
+                line++;
+        }
+        
+        // get the name part of the rest of the line
+        strtok(line, ":");      
+        
+        // alloc output buffer
+        size_t len = str_size(line);
+        char *name = malloc(len + 1);
+        
+        if (NULL != name) {
+                // copy the result to the output buffer
+                str_cpy(name, len, line);
+        }
+
+        return name;
+}
+
+static inline char * skip_spaces(char *line) 
+{
+        // skip leading spaces
+        while (0 != *line && isspace(*line)) {
+                line++;
+        }
+        return line;    
+}
+
+
+void isa_child_set_irq(device_t *dev, int irq)
+{
+        // TODO
+}
+
+static void get_dev_irq(device_t *dev, char *val)
+{
+        int irq = 0;
+        char *end = NULL;
+        
+        val = skip_spaces(val); 
+        irq = strtol(val, &end, 0x10);
+        
+        if (val != end) {
+                isa_child_set_irq(dev, irq);            
+        }
+}
+
+static void get_dev_io_range(device_t *dev, char *val)
+{
+        // TODO
+}
+
+static void get_dev_macth_id(device_t *dev, char *val)
+{
+        // TODO
+}
+
+static void get_dev_prop(device_t *dev, char *line)
+{
+        // skip leading spaces
+        line = skip_spaces(line);
+        
+        // value of the property
+        char *val;
+        
+        if (NULL != (val = strtok(line, "io_range"))) {         
+                get_dev_io_range(dev, val);
+        } else if (NULL != (val = strtok(line, "irq"))) {
+                get_dev_irq(dev, val);          
+        } else if (NULL != (val = strtok(line, "match"))) {
+                get_dev_macth_id(dev, val);
+        }       
+}
+
+static char * read_isa_dev_info(char *dev_conf, device_t *parent)
+{
+        char *line;
+        bool cont = true;
+        char *dev_name = NULL;
+        
+        // skip empty lines
+        while (cont) {
+                line = dev_conf;                
+                dev_conf = str_get_line(line);
+                
+                if (NULL == dev_conf) {
+                        // no more lines
+                        return NULL;
+                }
+                
+                if (!line_empty(line)) {
+                        break;
+                }
+                
+                if (NULL == dev_conf) {
+                        return NULL;
+                }
+        }
+        
+        // get device name
+        dev_name = get_device_name(line);
+        if (NULL == dev_name) {
+                return NULL;
+        }
+        
+        device_t *dev = create_isa_child_dev();
+        if (NULL == dev) {
+                free(dev_name);
+                return NULL;
+        }
+        dev->name = dev_name;
+        
+        // get properties of the device (match ids, irq and io range)
+        cont = true;
+        while (cont) {
+                line = dev_conf;                
+                dev_conf = str_get_line(line);
+                cont = line_empty(line);
+                // get the device's property from the configuration line and store it in the device structure
+                if (cont) {
+                        get_dev_prop(dev, line);
+                }               
+        }
+        
+        // TODO class & interfaces !!!
+        child_device_register(dev, parent);
+        
+        return dev_conf;        
+}
+
+static char * parse_dev_conf(char *conf, device_t *parent)
+{
+        while (NULL != conf) {
+                conf = read_isa_dev_info(conf, parent);
+        }       
+}
+
+static void add_legacy_children(device_t *parent)
+{
+        char *dev_conf = read_dev_conf(CHILD_DEV_CONF_PATH); 
+        if (NULL != dev_conf) {
+                parse_dev_conf(dev_conf, parent);       
+                free(dev_conf);
+        }
+}
 
 static bool isa_add_device(device_t *dev) 
@@ -72 +322 @@
         printf(NAME ": isa_add_device, device handle = %d\n", dev->handle);
         
-        // TODO add children 
+        // add child devices    
+        add_legacy_children(dev);
         
         return true;