Add support for two MEN UARTs (16z025 and 16z057) to the
8250_men_mcb driver.
The 16z025 consists of up to four ports, the 16z057 has
exactly four ports. Apart from that, all of them share the
Port settings.
Signed-off-by: Michael Moese <[email protected]>
Reported-by: Ben Turner <[email protected]>
Tested-by: Ben Turner <[email protected]>
---
Changes to v1:
Deduplicated the two switch() blocks into a function returning
the number of ports.
Minor style corrections.
---
drivers/tty/serial/8250/8250_men_mcb.c | 124 ++++++++++++++++++++++++---------
drivers/tty/serial/8250/Kconfig | 5 +-
2 files changed, 93 insertions(+), 36 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_men_mcb.c b/drivers/tty/serial/8250/8250_men_mcb.c
index 308977807994..98b6b919bca6 100644
--- a/drivers/tty/serial/8250/8250_men_mcb.c
+++ b/drivers/tty/serial/8250/8250_men_mcb.c
@@ -7,6 +7,12 @@
#include <linux/serial_8250.h>
#include <uapi/linux/serial_core.h>
+#define MEN_UART_ID_Z025 0x19
+#define MEN_UART_ID_Z057 0x39
+#define MEN_UART_ID_Z125 0x7d
+
+#define MEN_UART_MEM_SIZE 0x10
+
struct serial_8250_men_mcb_data {
struct uart_8250_port uart;
int line;
@@ -18,7 +24,7 @@ struct serial_8250_men_mcb_data {
* parameter in order to really set the correct baudrate, and
* do so if possible without user interaction
*/
-static u32 men_z125_lookup_uartclk(struct mcb_device *mdev)
+static u32 men_lookup_uartclk(struct mcb_device *mdev)
{
/* use default value if board is not available below */
u32 clkval = 1041666;
@@ -28,10 +34,12 @@ static u32 men_z125_lookup_uartclk(struct mcb_device *mdev)
mdev->bus->name);
if (strncmp(mdev->bus->name, "F075", 4) == 0)
clkval = 1041666;
- else if (strncmp(mdev->bus->name, "F216", 4) == 0)
+ else if (strncmp(mdev->bus->name, "F216", 4) == 0)
clkval = 1843200;
else if (strncmp(mdev->bus->name, "G215", 4) == 0)
clkval = 1843200;
+ else if (strncmp(mdev->bus->name, "F210", 4) == 0)
+ clkval = 115200;
else
dev_info(&mdev->dev,
"board not detected, using default uartclk\n");
@@ -41,62 +49,108 @@ static u32 men_z125_lookup_uartclk(struct mcb_device *mdev)
return clkval;
}
+static unsigned int get_num_ports(struct mcb_device *mdev,
+ void __iomem *membase)
+{
+ switch (mdev->id) {
+ case MEN_UART_ID_Z125:
+ return 1U;
+ case MEN_UART_ID_Z025:
+ return readb(membase) >> 4;
+ case MEN_UART_ID_Z057:
+ return 4U;
+ default:
+ dev_err(&mdev->dev, "no supported device!\n");
+ return -ENODEV;
+ }
+}
+
static int serial_8250_men_mcb_probe(struct mcb_device *mdev,
const struct mcb_device_id *id)
{
struct serial_8250_men_mcb_data *data;
struct resource *mem;
-
- data = devm_kzalloc(&mdev->dev,
- sizeof(struct serial_8250_men_mcb_data),
- GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- mcb_set_drvdata(mdev, data);
- data->uart.port.dev = mdev->dma_dev;
- spin_lock_init(&data->uart.port.lock);
-
- data->uart.port.type = PORT_16550;
- data->uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
- data->uart.port.iotype = UPIO_MEM;
- data->uart.port.uartclk = men_z125_lookup_uartclk(mdev);
- data->uart.port.regshift = 0;
- data->uart.port.fifosize = 60;
+ unsigned int num_ports;
+ unsigned int i;
+ void __iomem *membase;
mem = mcb_get_resource(mdev, IORESOURCE_MEM);
if (mem == NULL)
return -ENXIO;
+ membase = devm_ioremap_resource(&mdev->dev, mem);
+ if (IS_ERR(membase))
+ return PTR_ERR_OR_ZERO(membase);
- data->uart.port.irq = mcb_get_irq(mdev);
+ num_ports = get_num_ports(mdev, membase);
- data->uart.port.membase = devm_ioremap_resource(&mdev->dev, mem);
- if (IS_ERR(data->uart.port.membase))
- return PTR_ERR_OR_ZERO(data->uart.port.membase);
+ dev_dbg(&mdev->dev, "found a 16z%03u with %u ports\n",
+ mdev->id, num_ports);
- data->uart.port.mapbase = (unsigned long) mem->start;
- data->uart.port.iobase = data->uart.port.mapbase;
+ if (num_ports == 0 || num_ports > 4) {
+ dev_err(&mdev->dev, "unexpected number of ports: %u\n",
+ num_ports);
+ return -ENODEV;
+ }
- /* ok, register the port */
- data->line = serial8250_register_8250_port(&data->uart);
- if (data->line < 0)
- return data->line;
+ data = devm_kcalloc(&mdev->dev, num_ports,
+ sizeof(struct serial_8250_men_mcb_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- dev_info(&mdev->dev, "found 16Z125 UART: ttyS%d\n", data->line);
+ mcb_set_drvdata(mdev, data);
+
+ for (i = 0; i < num_ports; i++) {
+ data[i].uart.port.dev = mdev->dma_dev;
+ spin_lock_init(&data[i].uart.port.lock);
+
+ data[i].uart.port.type = PORT_16550;
+ data[i].uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ
+ | UPF_FIXED_TYPE;
+ data[i].uart.port.iotype = UPIO_MEM;
+ data[i].uart.port.uartclk = men_lookup_uartclk(mdev);
+ data[i].uart.port.regshift = 0;
+ data[i].uart.port.irq = mcb_get_irq(mdev);
+ data[i].uart.port.membase = membase;
+ data[i].uart.port.fifosize = 60;
+ data[i].uart.port.mapbase = (unsigned long) mem->start
+ + i * MEN_UART_MEM_SIZE;
+ data[i].uart.port.iobase = data[i].uart.port.mapbase;
+
+ /* ok, register the port */
+ data[i].line = serial8250_register_8250_port(&data[i].uart);
+ if (data[i].line < 0) {
+ dev_err(&mdev->dev, "unable to register UART port\n");
+ return data[i].line;
+ }
+ dev_info(&mdev->dev, "found MCB UART: ttyS%d\n", data[i].line);
+ }
return 0;
}
static void serial_8250_men_mcb_remove(struct mcb_device *mdev)
{
+ unsigned int num_ports, i;
struct serial_8250_men_mcb_data *data = mcb_get_drvdata(mdev);
- if (data)
- serial8250_unregister_port(data->line);
+ if (!data)
+ return;
+
+ num_ports = get_num_ports(mdev, data[0].uart.port.membase);
+ if (num_ports < 0 || num_ports > 4) {
+ dev_err(&mdev->dev, "error retrieving number of ports!\n");
+ return;
+ }
+
+ for (i = 0; i < num_ports; i++)
+ serial8250_unregister_port(data[i].line);
}
static const struct mcb_device_id serial_8250_men_mcb_ids[] = {
- { .device = 0x7d },
+ { .device = MEN_UART_ID_Z025 },
+ { .device = MEN_UART_ID_Z057 },
+ { .device = MEN_UART_ID_Z125 },
{ }
};
MODULE_DEVICE_TABLE(mcb, serial_8250_men_mcb_ids);
@@ -113,6 +167,8 @@ static struct mcb_driver mcb_driver = {
module_mcb_driver(mcb_driver);
MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("MEN 16z125 8250 UART driver");
+MODULE_DESCRIPTION("MEN 8250 UART driver");
MODULE_AUTHOR("Michael Moese <[email protected]");
MODULE_ALIAS("mcb:16z125");
+MODULE_ALIAS("mcb:16z025");
+MODULE_ALIAS("mcb:16z057");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index 16b1496e6105..f005eaf8bc57 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -157,11 +157,12 @@ config SERIAL_8250_CS
If unsure, say N.
config SERIAL_8250_MEN_MCB
- tristate "MEN Z125 UART device support"
+ tristate "MEN MCB UART device support"
depends on MCB && SERIAL_8250
help
This enables support for FPGA based UARTs found on many MEN
- boards. This driver enables support for the Z125 UARTs.
+ boards. This driver enables support for the 16z025, 16z057
+ and 16z125 UARTs.
To compile this driver as a module, chose M here: the
module will be called 8250_men_mcb.
--
2.13.6
Hi Michael,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on tty/tty-testing]
[also build test ERROR on v4.16-rc3 next-20180302]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Michael-Moese/8250-men-mcb-add-support-for-16z025-and-16z057/20180303-104548
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: sparc64-allyesconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sparc64
All errors (new ones prefixed by >>):
drivers/tty/serial/8250/8250_men_mcb.c: In function 'get_num_ports':
>> drivers/tty/serial/8250/8250_men_mcb.c:59:10: error: implicit declaration of function 'readb' [-Werror=implicit-function-declaration]
return readb(membase) >> 4;
^~~~~
cc1: some warnings being treated as errors
vim +/readb +59 drivers/tty/serial/8250/8250_men_mcb.c
51
52 static unsigned int get_num_ports(struct mcb_device *mdev,
53 void __iomem *membase)
54 {
55 switch (mdev->id) {
56 case MEN_UART_ID_Z125:
57 return 1U;
58 case MEN_UART_ID_Z025:
> 59 return readb(membase) >> 4;
60 case MEN_UART_ID_Z057:
61 return 4U;
62 default:
63 dev_err(&mdev->dev, "no supported device!\n");
64 return -ENODEV;
65 }
66 }
67
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
On Sat, Mar 3, 2018 at 6:51 AM, kbuild test robot <[email protected]> wrote:
> Hi Michael,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on tty/tty-testing]
> [also build test ERROR on v4.16-rc3 next-20180302]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Michael-Moese/8250-men-mcb-add-support-for-16z025-and-16z057/20180303-104548
> base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
> config: sparc64-allyesconfig (attached as .config)
> compiler: sparc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> make.cross ARCH=sparc64
>
> All errors (new ones prefixed by >>):
>
> drivers/tty/serial/8250/8250_men_mcb.c: In function 'get_num_ports':
>>> drivers/tty/serial/8250/8250_men_mcb.c:59:10: error: implicit declaration of function 'readb' [-Werror=implicit-function-declaration]
> return readb(membase) >> 4;
> ^~~~~
> cc1: some warnings being treated as errors
I suppose kbuildbot can generate patches in similar cases, i.e. adding
"#include <linux/io.h>" has to cure this.
>
> vim +/readb +59 drivers/tty/serial/8250/8250_men_mcb.c
>
> 51
> 52 static unsigned int get_num_ports(struct mcb_device *mdev,
> 53 void __iomem *membase)
> 54 {
> 55 switch (mdev->id) {
> 56 case MEN_UART_ID_Z125:
> 57 return 1U;
> 58 case MEN_UART_ID_Z025:
> > 59 return readb(membase) >> 4;
> 60 case MEN_UART_ID_Z057:
> 61 return 4U;
> 62 default:
> 63 dev_err(&mdev->dev, "no supported device!\n");
> 64 return -ENODEV;
> 65 }
> 66 }
> 67
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
--
With Best Regards,
Andy Shevchenko