static int __init lirc_parallel_init(void)
{
pport = parport_find_base(io);
if (pport == NULL) {
printk(KERN_NOTICE "%s: no port at %x found\n",
LIRC_DRIVER_NAME, io);
return -ENXIO;
}
ppdevice = parport_register_device(pport, LIRC_DRIVER_NAME,
pf, kf, irq_handler, 0, NULL);
parport_put_port(pport);
if (ppdevice == NULL) {
printk(KERN_NOTICE "%s: parport_register_device() failed\n",
LIRC_DRIVER_NAME);
return -ENXIO;
}
if (parport_claim(ppdevice) != 0)
goto skip_init;
is_claimed = 1;
out(LIRC_LP_CONTROL, LP_PSELECP|LP_PINITP);
#ifdef LIRC_TIMER
if (debug)
out(LIRC_PORT_DATA, tx_mask);
timer = init_lirc_timer();
#if 0 /* continue even if device is offline */
if (timer == 0) {
is_claimed = 0;
parport_release(pport);
parport_unregister_device(ppdevice);
return -EIO;
}
#endif
if (debug)
out(LIRC_PORT_DATA, 0);
#endif
is_claimed = 0;
parport_release(ppdevice);
skip_init:
driver.minor = lirc_register_driver(&driver);
if (driver.minor < 0) {
printk(KERN_NOTICE "%s: register_chrdev() failed\n",
LIRC_DRIVER_NAME);
parport_unregister_device(ppdevice);
return -EIO;
}
printk(KERN_INFO "%s: installed using port 0x%04x irq %d\n",
LIRC_DRIVER_NAME, io, irq);
return 0;
}
// Release parport for others to use
static inline void w9966_pdev_release(struct w9966_dev* cam)
{
if (!w9966_flag_test(cam, W9966_STATE_CLAIMED))
return;
parport_release(cam->pdev);
w9966_flag_clear(cam, W9966_STATE_CLAIMED);
}
static void butterfly_detach(struct parport *p)
{
struct butterfly *pp;
int status;
/* FIXME this global is ugly ... but, how to quickly get from
* the parport to the "struct butterfly" associated with it?
* "old school" driver-internal device lists?
*/
if (!butterfly || butterfly->port != p)
return;
pp = butterfly;
butterfly = NULL;
/* stop() unregisters child devices too */
status = spi_bitbang_stop(&pp->bitbang);
/* turn off VCC */
parport_write_data(pp->port, 0);
msleep(10);
parport_release(pp->pd);
parport_unregister_device(pp->pd);
(void) spi_master_put(pp->bitbang.master);
}
// Release parport for others to use
static inline void w9966_pdev_release(struct w9966_dev* cam)
{
if (w9966_getState(cam, W9966_STATE_CLAIMED, 0))
return;
parport_release(cam->pdev);
w9966_setState(cam, W9966_STATE_CLAIMED, 0);
}
static int lirc_close(struct inode *node, struct file *filep)
{
if (is_claimed) {
is_claimed = 0;
parport_release(ppdevice);
}
is_open = 0;
return 0;
}
static void i2c_parport_attach (struct parport *port)
{
struct i2c_par *adapter;
adapter = kmalloc(sizeof(struct i2c_par), GFP_KERNEL);
if (adapter == NULL) {
printk(KERN_ERR "i2c-parport: Failed to kmalloc\n");
return;
}
memset(adapter, 0x00, sizeof(struct i2c_par));
pr_debug("i2c-parport: attaching to %s\n", port->name);
adapter->pdev = parport_register_device(port, "i2c-parport",
NULL, NULL, NULL, PARPORT_FLAG_EXCL, NULL);
if (!adapter->pdev) {
printk(KERN_ERR "i2c-parport: Unable to register with parport\n");
goto ERROR0;
}
/* Fill the rest of the structure */
adapter->adapter = parport_adapter;
adapter->algo_data = parport_algo_data;
if (!adapter_parm[type].getscl.val)
adapter->algo_data.getscl = NULL;
adapter->algo_data.data = port;
adapter->adapter.algo_data = &adapter->algo_data;
if (parport_claim_or_block(adapter->pdev) < 0) {
printk(KERN_ERR "i2c-parport: Could not claim parallel port\n");
goto ERROR1;
}
/* Reset hardware to a sane state (SCL and SDA high) */
parport_setsda(port, 1);
parport_setscl(port, 1);
/* Other init if needed (power on...) */
if (adapter_parm[type].init.val)
line_set(port, 1, &adapter_parm[type].init);
parport_release(adapter->pdev);
if (i2c_bit_add_bus(&adapter->adapter) < 0) {
printk(KERN_ERR "i2c-parport: Unable to register with I2C\n");
goto ERROR1;
}
/* Add the new adapter to the list */
adapter->next = adapter_list;
adapter_list = adapter;
return;
ERROR1:
parport_unregister_device(adapter->pdev);
ERROR0:
kfree(adapter);
}
static void output_close(struct hfmodem_state *dev)
{
/* release regions used for PTT output */
output_status(dev, 0);
if (dev->ptt_out.flags & SP_SER)
release_region(dev->ptt_out.seriobase, SER_EXTENT);
if (dev->ptt_out.flags & SP_PAR)
parport_release(dev->ptt_out.pardev);
if (dev->ptt_out.flags & SP_MIDI)
release_region(dev->ptt_out.midiiobase, MIDI_EXTENT);
dev->ptt_out.flags = 0;
}
static void sm_output_close(struct sm_state *sm)
{
/* release regions used for PTT output */
sm->hdrv.hdlctx.ptt = sm->hdrv.hdlctx.calibrate = 0;
sm_output_status(sm);
if (sm->hdrv.ptt_out.flags & SP_SER)
release_region(sm->hdrv.ptt_out.seriobase, SER_EXTENT);
if (sm->hdrv.ptt_out.flags & SP_PAR && sm->pardev) {
parport_release(sm->pardev);
parport_unregister_device(sm->pardev);
}
if (sm->hdrv.ptt_out.flags & SP_MIDI)
release_region(sm->hdrv.ptt_out.midiiobase, MIDI_EXTENT);
sm->hdrv.ptt_out.flags = 0;
}
struct pardevice *parport_open (int devnum, const char *name,
int (*pf) (void *), void (*kf) (void *),
void (*irqf) (int, void *, struct pt_regs *),
int flags, void *handle)
{
struct daisydev *p = topology;
struct parport *port;
struct pardevice *dev;
int daisy;
spin_lock(&topology_lock);
while (p && p->devnum != devnum)
p = p->next;
if (!p) {
spin_unlock(&topology_lock);
return NULL;
}
daisy = p->daisy;
port = parport_get_port(p->port);
spin_unlock(&topology_lock);
dev = parport_register_device (port, name, pf, kf,
irqf, flags, handle);
parport_put_port(port);
if (!dev)
return NULL;
dev->daisy = daisy;
/* Check that there really is a device to select. */
if (daisy >= 0) {
int selected;
parport_claim_or_block (dev);
selected = port->daisy;
parport_release (dev);
if (selected != daisy) {
/* No corresponding device. */
parport_unregister_device (dev);
return NULL;
}
}
return dev;
}
struct pardevice *parport_open(int devnum, const char *name)
{
struct daisydev *p = topology;
struct parport *port;
struct pardevice *dev;
int daisy;
spin_lock(&topology_lock);
while (p && p->devnum != devnum)
p = p->next;
if (!p) {
spin_unlock(&topology_lock);
return NULL;
}
daisy = p->daisy;
port = parport_get_port(p->port);
spin_unlock(&topology_lock);
dev = parport_register_device(port, name, NULL, NULL, NULL, 0, NULL);
parport_put_port(port);
if (!dev)
return NULL;
dev->daisy = daisy;
if (daisy >= 0) {
int selected;
parport_claim_or_block(dev);
selected = port->daisy;
parport_release(dev);
if (selected != daisy) {
parport_unregister_device(dev);
return NULL;
}
}
return dev;
}
struct pardevice *parport_open (int devnum, const char *name,
int (*pf) (void *), void (*kf) (void *),
void (*irqf) (int, void *, struct pt_regs *),
int flags, void *handle)
{
struct parport *port = parport_enumerate ();
struct pardevice *dev;
int portnum;
int muxnum;
int daisynum;
if (parport_device_coords (devnum, &portnum, &muxnum, &daisynum))
return NULL;
while (port && ((port->portnum != portnum) ||
(port->muxport != muxnum)))
port = port->next;
if (!port)
/* No corresponding parport. */
return NULL;
dev = parport_register_device (port, name, pf, kf,
irqf, flags, handle);
if (dev)
dev->daisy = daisynum;
/* Check that there really is a device to select. */
if (daisynum >= 0) {
int selected;
parport_claim_or_block (dev);
selected = port->daisy;
parport_release (dev);
if (selected != port->daisy) {
/* No corresponding device. */
parport_unregister_device (dev);
return NULL;
}
}
return dev;
}
static void i2c_parport_attach (struct parport *port)
{
struct i2c_par *adapter = kmalloc(sizeof(struct i2c_par),
GFP_KERNEL);
if (!adapter) {
printk(KERN_ERR "i2c-philips-par: Unable to malloc.\n");
return;
}
printk(KERN_DEBUG "i2c-philips-par.o: attaching to %s\n", port->name);
adapter->pdev = parport_register_device(port, "i2c-philips-par",
NULL, NULL, NULL,
PARPORT_FLAG_EXCL,
NULL);
if (!adapter->pdev) {
printk(KERN_ERR "i2c-philips-par: Unable to register with parport.\n");
return;
}
adapter->adapter = bit_lp_ops;
adapter->adapter.algo_data = &adapter->bit_lp_data;
adapter->bit_lp_data = type ? bit_lp_data2 : bit_lp_data;
adapter->bit_lp_data.data = port;
/* reset hardware to sane state */
parport_claim_or_block(adapter->pdev);
adapter->bit_lp_data.setsda(port, 1);
adapter->bit_lp_data.setscl(port, 1);
parport_release(adapter->pdev);
if (i2c_bit_add_bus(&adapter->adapter) < 0)
{
printk(KERN_ERR "i2c-philips-par: Unable to register with I2C.\n");
parport_unregister_device(adapter->pdev);
kfree(adapter);
return; /* No good */
}
adapter->next = adapter_list;
adapter_list = adapter;
}
static void spi_lm70llp_detach(struct parport *p)
{
struct spi_lm70llp *pp;
if (!lm70llp || lm70llp->port != p)
return;
pp = lm70llp;
spi_bitbang_stop(&pp->bitbang);
parport_write_data(pp->port, 0);
parport_release(pp->pd);
parport_unregister_device(pp->pd);
(void) spi_master_put(pp->bitbang.master);
lm70llp = NULL;
}
static void butterfly_detach(struct parport *p)
{
struct butterfly *pp;
int status;
if (!butterfly || butterfly->port != p)
return;
pp = butterfly;
butterfly = NULL;
/* stop() unregisters child devices too */
status = spi_bitbang_stop(&pp->bitbang);
/* turn off VCC */
parport_write_data(pp->port, 0);
msleep(10);
parport_release(pp->pd);
parport_unregister_device(pp->pd);
(void) spi_master_put(pp->bitbang.master);
}
static void butterfly_detach(struct parport *p)
{
struct butterfly *pp;
struct platform_device *pdev;
int status;
/* FIXME this global is ugly ... but, how to quickly get from
* the parport to the "struct butterfly" associated with it?
* "old school" driver-internal device lists?
*/
if (!butterfly || butterfly->port != p)
return;
pp = butterfly;
butterfly = NULL;
#ifdef HAVE_USI
spi_unregister_device(pp->butterfly);
pp->butterfly = NULL;
#endif
spi_unregister_device(pp->dataflash);
pp->dataflash = NULL;
status = spi_bitbang_stop(&pp->bitbang);
/* turn off VCC */
parport_write_data(pp->port, 0);
msleep(10);
parport_release(pp->pd);
parport_unregister_device(pp->pd);
pdev = to_platform_device(pp->bitbang.master->cdev.dev);
(void) spi_master_put(pp->bitbang.master);
platform_device_unregister(pdev);
}
static void __exit ks0108_exit(void)
{
parport_release(ks0108_pardevice);
parport_unregister_device(ks0108_pardevice);
}
static void spi_lm70llp_attach(struct parport *p)
{
struct pardevice *pd;
struct spi_lm70llp *pp;
struct spi_master *master;
int status;
if (lm70llp) {
printk(KERN_WARNING
"%s: spi_lm70llp instance already loaded. Aborting.\n",
DRVNAME);
return;
}
master = spi_alloc_master(p->physport->dev, sizeof *pp);
if (!master) {
status = -ENOMEM;
goto out_fail;
}
pp = spi_master_get_devdata(master);
master->bus_num = -1;
master->num_chipselect = 1;
pp->bitbang.master = spi_master_get(master);
pp->bitbang.chipselect = lm70_chipselect;
pp->bitbang.txrx_word[SPI_MODE_0] = lm70_txrx;
pp->bitbang.flags = SPI_3WIRE;
pp->port = p;
pd = parport_register_device(p, DRVNAME,
NULL, NULL, NULL,
PARPORT_FLAG_EXCL, pp);
if (!pd) {
status = -ENOMEM;
goto out_free_master;
}
pp->pd = pd;
status = parport_claim(pd);
if (status < 0)
goto out_parport_unreg;
status = spi_bitbang_start(&pp->bitbang);
if (status < 0) {
printk(KERN_WARNING
"%s: spi_bitbang_start failed with status %d\n",
DRVNAME, status);
goto out_off_and_release;
}
strcpy(pp->info.modalias, "lm70");
pp->info.max_speed_hz = 6 * 1000 * 1000;
pp->info.chip_select = 0;
pp->info.mode = SPI_3WIRE | SPI_MODE_0;
parport_write_data(pp->port, lm70_INIT);
pp->info.controller_data = pp;
pp->spidev_lm70 = spi_new_device(pp->bitbang.master, &pp->info);
if (pp->spidev_lm70)
dev_dbg(&pp->spidev_lm70->dev, "spidev_lm70 at %s\n",
dev_name(&pp->spidev_lm70->dev));
else {
printk(KERN_WARNING "%s: spi_new_device failed\n", DRVNAME);
status = -ENODEV;
goto out_bitbang_stop;
}
pp->spidev_lm70->bits_per_word = 8;
lm70llp = pp;
return;
out_bitbang_stop:
spi_bitbang_stop(&pp->bitbang);
out_off_and_release:
parport_write_data(pp->port, 0);
mdelay(10);
parport_release(pp->pd);
out_parport_unreg:
parport_unregister_device(pd);
out_free_master:
(void) spi_master_put(master);
out_fail:
pr_info("%s: spi_lm70llp probe fail, status %d\n", DRVNAME, status);
}
static int __init lirc_parallel_init(void)
{
int result;
result = platform_driver_register(&lirc_parallel_driver);
if (result) {
pr_notice("platform_driver_register returned %d\n", result);
return result;
}
lirc_parallel_dev = platform_device_alloc(LIRC_DRIVER_NAME, 0);
if (!lirc_parallel_dev) {
result = -ENOMEM;
goto exit_driver_unregister;
}
result = platform_device_add(lirc_parallel_dev);
if (result)
goto exit_device_put;
pport = parport_find_base(io);
if (pport == NULL) {
pr_notice("no port at %x found\n", io);
result = -ENXIO;
goto exit_device_put;
}
ppdevice = parport_register_device(pport, LIRC_DRIVER_NAME,
pf, kf, lirc_lirc_irq_handler, 0,
NULL);
parport_put_port(pport);
if (ppdevice == NULL) {
pr_notice("parport_register_device() failed\n");
result = -ENXIO;
goto exit_device_put;
}
if (parport_claim(ppdevice) != 0)
goto skip_init;
is_claimed = 1;
out(LIRC_LP_CONTROL, LP_PSELECP|LP_PINITP);
#ifdef LIRC_TIMER
if (debug)
out(LIRC_PORT_DATA, tx_mask);
timer = init_lirc_timer();
#if 0 /* continue even if device is offline */
if (timer == 0) {
is_claimed = 0;
parport_release(pport);
parport_unregister_device(ppdevice);
result = -EIO;
goto exit_device_put;
}
#endif
if (debug)
out(LIRC_PORT_DATA, 0);
#endif
is_claimed = 0;
parport_release(ppdevice);
skip_init:
driver.dev = &lirc_parallel_dev->dev;
driver.minor = lirc_register_driver(&driver);
if (driver.minor < 0) {
pr_notice("register_chrdev() failed\n");
parport_unregister_device(ppdevice);
result = -EIO;
goto exit_device_put;
}
pr_info("installed using port 0x%04x irq %d\n", io, irq);
return 0;
exit_device_put:
platform_device_put(lirc_parallel_dev);
exit_driver_unregister:
platform_driver_unregister(&lirc_parallel_driver);
return result;
}
static void butterfly_attach(struct parport *p)
{
struct pardevice *pd;
int status;
struct butterfly *pp;
struct spi_master *master;
struct platform_device *pdev;
if (butterfly)
return;
/* REVISIT: this just _assumes_ a butterfly is there ... no probe,
* and no way to be selective about what it binds to.
*/
/* FIXME where should master->cdev.dev come from?
* e.g. /sys/bus/pnp0/00:0b, some PCI thing, etc
* setting up a platform device like this is an ugly kluge...
*/
pdev = platform_device_register_simple("butterfly", -1, NULL, 0);
master = spi_alloc_master(&pdev->dev, sizeof *pp);
if (!master) {
status = -ENOMEM;
goto done;
}
pp = spi_master_get_devdata(master);
/*
* SPI and bitbang hookup
*
* use default setup(), cleanup(), and transfer() methods; and
* only bother implementing mode 0. Start it later.
*/
master->bus_num = 42;
master->num_chipselect = 2;
pp->bitbang.master = spi_master_get(master);
pp->bitbang.chipselect = butterfly_chipselect;
pp->bitbang.txrx_word[SPI_MODE_0] = butterfly_txrx_word_mode0;
/*
* parport hookup
*/
pp->port = p;
pd = parport_register_device(p, "spi_butterfly",
NULL, NULL, NULL,
0 /* FLAGS */, pp);
if (!pd) {
status = -ENOMEM;
goto clean0;
}
pp->pd = pd;
status = parport_claim(pd);
if (status < 0)
goto clean1;
/*
* Butterfly reset, powerup, run firmware
*/
pr_debug("%s: powerup/reset Butterfly\n", p->name);
/* nCS for dataflash (this bit is inverted on output) */
parport_frob_control(pp->port, spi_cs_bit, 0);
/* stabilize power with chip in reset (nRESET), and
* both spi_sck_bit and usi_sck_bit clear (CPOL=0)
*/
pp->lastbyte |= vcc_bits;
parport_write_data(pp->port, pp->lastbyte);
msleep(5);
/* take it out of reset; assume long reset delay */
pp->lastbyte |= butterfly_nreset;
parport_write_data(pp->port, pp->lastbyte);
msleep(100);
/*
* Start SPI ... for now, hide that we're two physical busses.
*/
status = spi_bitbang_start(&pp->bitbang);
if (status < 0)
goto clean2;
/* Bus 1 lets us talk to at45db041b (firmware disables AVR)
* or AVR (firmware resets at45, acts as spi slave)
*/
pp->info[0].max_speed_hz = 15 * 1000 * 1000;
strcpy(pp->info[0].modalias, "mtd_dataflash");
pp->info[0].platform_data = &flash;
pp->info[0].chip_select = 1;
pp->info[0].controller_data = pp;
pp->dataflash = spi_new_device(pp->bitbang.master, &pp->info[0]);
if (pp->dataflash)
pr_debug("%s: dataflash at %s\n", p->name,
pp->dataflash->dev.bus_id);
#ifdef HAVE_USI
/* even more custom AVR firmware */
pp->info[1].max_speed_hz = 10 /* ?? */ * 1000 * 1000;
strcpy(pp->info[1].modalias, "butterfly");
// pp->info[1].platform_data = ... TBD ... ;
pp->info[1].chip_select = 2,
pp->info[1].controller_data = pp;
pp->butterfly = spi_new_device(pp->bitbang.master, &pp->info[1]);
if (pp->butterfly)
pr_debug("%s: butterfly at %s\n", p->name,
pp->butterfly->dev.bus_id);
/* FIXME setup ACK for the IRQ line ... */
#endif
// dev_info(_what?_, ...)
pr_info("%s: AVR Butterfly\n", p->name);
butterfly = pp;
return;
clean2:
/* turn off VCC */
parport_write_data(pp->port, 0);
parport_release(pp->pd);
clean1:
parport_unregister_device(pd);
clean0:
(void) spi_master_put(pp->bitbang.master);
done:
platform_device_unregister(pdev);
pr_debug("%s: butterfly probe, fail %d\n", p->name, status);
}
static void spi_lm70llp_attach(struct parport *p)
{
struct pardevice *pd;
struct spi_lm70llp *pp;
struct spi_master *master;
int status;
if (lm70llp) {
printk(KERN_WARNING
"%s: spi_lm70llp instance already loaded. Aborting.\n",
DRVNAME);
return;
}
/* TODO: this just _assumes_ a lm70 is there ... no probe;
* the lm70 driver could verify it, reading the manf ID.
*/
master = spi_alloc_master(p->physport->dev, sizeof *pp);
if (!master) {
status = -ENOMEM;
goto out_fail;
}
pp = spi_master_get_devdata(master);
master->bus_num = -1; /* dynamic alloc of a bus number */
master->num_chipselect = 1;
/*
* SPI and bitbang hookup.
*/
pp->bitbang.master = spi_master_get(master);
pp->bitbang.chipselect = lm70_chipselect;
pp->bitbang.txrx_word[SPI_MODE_0] = lm70_txrx;
pp->bitbang.flags = SPI_3WIRE;
/*
* Parport hookup
*/
pp->port = p;
pd = parport_register_device(p, DRVNAME,
NULL, NULL, NULL,
PARPORT_FLAG_EXCL, pp);
if (!pd) {
status = -ENOMEM;
goto out_free_master;
}
pp->pd = pd;
status = parport_claim(pd);
if (status < 0)
goto out_parport_unreg;
/*
* Start SPI ...
*/
status = spi_bitbang_start(&pp->bitbang);
if (status < 0) {
printk(KERN_WARNING
"%s: spi_bitbang_start failed with status %d\n",
DRVNAME, status);
goto out_off_and_release;
}
/*
* The modalias name MUST match the device_driver name
* for the bus glue code to match and subsequently bind them.
* We are binding to the generic drivers/hwmon/lm70.c device
* driver.
*/
strcpy(pp->info.modalias, "lm70");
pp->info.max_speed_hz = 6 * 1000 * 1000;
pp->info.chip_select = 0;
pp->info.mode = SPI_3WIRE | SPI_MODE_0;
/* power up the chip, and let the LM70 control SI/SO */
parport_write_data(pp->port, lm70_INIT);
/* Enable access to our primary data structure via
* the board info's (void *)controller_data.
*/
pp->info.controller_data = pp;
pp->spidev_lm70 = spi_new_device(pp->bitbang.master, &pp->info);
if (pp->spidev_lm70)
dev_dbg(&pp->spidev_lm70->dev, "spidev_lm70 at %s\n",
dev_name(&pp->spidev_lm70->dev));
else {
printk(KERN_WARNING "%s: spi_new_device failed\n", DRVNAME);
status = -ENODEV;
goto out_bitbang_stop;
}
pp->spidev_lm70->bits_per_word = 8;
lm70llp = pp;
return;
out_bitbang_stop:
spi_bitbang_stop(&pp->bitbang);
out_off_and_release:
/* power down */
parport_write_data(pp->port, 0);
mdelay(10);
parport_release(pp->pd);
out_parport_unreg:
parport_unregister_device(pd);
out_free_master:
(void) spi_master_put(master);
out_fail:
pr_info("%s: spi_lm70llp probe fail, status %d\n", DRVNAME, status);
}
static void butterfly_attach(struct parport *p)
{
struct pardevice *pd;
int status;
struct butterfly *pp;
struct spi_master *master;
struct device *dev = p->physport->dev;
if (butterfly || !dev)
return;
master = spi_alloc_master(dev, sizeof *pp);
if (!master) {
status = -ENOMEM;
goto done;
}
pp = spi_master_get_devdata(master);
master->bus_num = 42;
master->num_chipselect = 2;
pp->bitbang.master = spi_master_get(master);
pp->bitbang.chipselect = butterfly_chipselect;
pp->bitbang.txrx_word[SPI_MODE_0] = butterfly_txrx_word_mode0;
pp->port = p;
pd = parport_register_device(p, "spi_butterfly",
NULL, NULL, NULL,
0 , pp);
if (!pd) {
status = -ENOMEM;
goto clean0;
}
pp->pd = pd;
status = parport_claim(pd);
if (status < 0)
goto clean1;
pr_debug("%s: powerup/reset Butterfly\n", p->name);
parport_frob_control(pp->port, spi_cs_bit, 0);
pp->lastbyte |= vcc_bits;
parport_write_data(pp->port, pp->lastbyte);
msleep(5);
pp->lastbyte |= butterfly_nreset;
parport_write_data(pp->port, pp->lastbyte);
msleep(100);
status = spi_bitbang_start(&pp->bitbang);
if (status < 0)
goto clean2;
pp->info[0].max_speed_hz = 15 * 1000 * 1000;
strcpy(pp->info[0].modalias, "mtd_dataflash");
pp->info[0].platform_data = &flash;
pp->info[0].chip_select = 1;
pp->info[0].controller_data = pp;
pp->dataflash = spi_new_device(pp->bitbang.master, &pp->info[0]);
if (pp->dataflash)
pr_debug("%s: dataflash at %s\n", p->name,
dev_name(&pp->dataflash->dev));
pr_info("%s: AVR Butterfly\n", p->name);
butterfly = pp;
return;
clean2:
parport_write_data(pp->port, 0);
parport_release(pp->pd);
clean1:
parport_unregister_device(pd);
clean0:
(void) spi_master_put(pp->bitbang.master);
done:
pr_debug("%s: butterfly probe, fail %d\n", p->name, status);
}
static void butterfly_attach(struct parport *p)
{
struct pardevice *pd;
int status;
struct butterfly *pp;
struct spi_master *master;
struct device *dev = p->physport->dev;
if (butterfly || !dev)
return;
/* REVISIT: this just _assumes_ a butterfly is there ... no probe,
* and no way to be selective about what it binds to.
*/
master = spi_alloc_master(dev, sizeof *pp);
if (!master) {
status = -ENOMEM;
goto done;
}
pp = spi_master_get_devdata(master);
/*
* SPI and bitbang hookup
*
* use default setup(), cleanup(), and transfer() methods; and
* only bother implementing mode 0. Start it later.
*/
master->bus_num = 42;
master->num_chipselect = 2;
pp->bitbang.master = spi_master_get(master);
pp->bitbang.chipselect = butterfly_chipselect;
pp->bitbang.txrx_word[SPI_MODE_0] = butterfly_txrx_word_mode0;
/*
* parport hookup
*/
pp->port = p;
pd = parport_register_device(p, "spi_butterfly",
NULL, NULL, NULL,
0 /* FLAGS */, pp);
if (!pd) {
status = -ENOMEM;
goto clean0;
}
pp->pd = pd;
status = parport_claim(pd);
if (status < 0)
goto clean1;
/*
* Butterfly reset, powerup, run firmware
*/
pr_debug("%s: powerup/reset Butterfly\n", p->name);
/* nCS for dataflash (this bit is inverted on output) */
parport_frob_control(pp->port, spi_cs_bit, 0);
/* stabilize power with chip in reset (nRESET), and
* spi_sck_bit clear (CPOL=0)
*/
pp->lastbyte |= vcc_bits;
parport_write_data(pp->port, pp->lastbyte);
msleep(5);
/* take it out of reset; assume long reset delay */
pp->lastbyte |= butterfly_nreset;
parport_write_data(pp->port, pp->lastbyte);
msleep(100);
/*
* Start SPI ... for now, hide that we're two physical busses.
*/
status = spi_bitbang_start(&pp->bitbang);
if (status < 0)
goto clean2;
/* Bus 1 lets us talk to at45db041b (firmware disables AVR SPI), AVR
* (firmware resets at45, acts as spi slave) or neither (we ignore
* both, AVR uses AT45). Here we expect firmware for the first option.
*/
pp->info[0].max_speed_hz = 15 * 1000 * 1000;
strcpy(pp->info[0].modalias, "mtd_dataflash");
pp->info[0].platform_data = &flash;
pp->info[0].chip_select = 1;
pp->info[0].controller_data = pp;
pp->dataflash = spi_new_device(pp->bitbang.master, &pp->info[0]);
if (pp->dataflash)
pr_debug("%s: dataflash at %s\n", p->name,
dev_name(&pp->dataflash->dev));
// dev_info(_what?_, ...)
pr_info("%s: AVR Butterfly\n", p->name);
butterfly = pp;
return;
clean2:
/* turn off VCC */
parport_write_data(pp->port, 0);
parport_release(pp->pd);
clean1:
parport_unregister_device(pd);
clean0:
(void) spi_master_put(pp->bitbang.master);
done:
pr_debug("%s: butterfly probe, fail %d\n", p->name, status);
}
