mirror of
git://projects.qi-hardware.com/iris.git
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318 lines
8.7 KiB
COBOL
318 lines
8.7 KiB
COBOL
#pypp 0
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// Iris: micro-kernel for a capability-based operating system.
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// boot-programs/udc.ccp: USB device controller driver.
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// Copyright 2009 Bas Wijnen <wijnen@debian.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "devices.hh"
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#include "init.hh"
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#define ARCH
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#include "arch.hh"
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class Udc:
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typedef unsigned char u8
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typedef unsigned short u16
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typedef unsigned int u32
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typedef u8 string
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// The ugly stuff is because pypp doesn't support __attribute__.
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/**/struct Setup {
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u8 request_type;
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u8 request;
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u16 value;
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u16 index;
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u16 length;
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} __attribute__ ((packed))
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/**/struct Device {
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static u8 const Type = 1;
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u8 length;
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u8 type;
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u16 usb_version;
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u8 dev_class;
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u8 subclass;
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u8 protocol;
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u8 max_packet_size0;
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u16 vendor;
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u16 product;
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u16 dev_version;
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string s_manufacturer;
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string s_product;
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string s_serial;
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u8 num_configurations;
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} __attribute__ ((packed))
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/**/struct Configuration {
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static u8 const Type = 2;
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u8 length;
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u8 type;
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u16 total_length;
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u8 num_interfaces;
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u8 configuration_value;
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u8 configuration;
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u8 attributes;
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u8 max_power;
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} __attribute__ ((packed))
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/**/struct Interface {
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static u8 const Type = 4;
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u8 length;
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u8 type;
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u8 interface;
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u8 alternate;
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u8 num_endpoints;
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u8 iface_class;
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u8 subclass;
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u8 protocol;
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string name;
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} __attribute__ ((packed))
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/**/struct Endpoint {
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static u8 const Type = 5;
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u8 length;
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u8 type;
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u8 address;
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u8 attributes;
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u16 max_packet_size;
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u8 interval;
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} __attribute__ ((packed))
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template <unsigned size> struct String {
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static u8 const Type = 3;
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u8 length;
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u8 type;
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u16 data[size];
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} __attribute__ ((packed))
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static unsigned const max_packet_size0 = 64
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static unsigned const max_packet_size_bulk = 512
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enum Requests:
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GET_STATUS = 0
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CLEAR_FEATURE = 1
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SET_FEATURE = 3
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SET_ADDRESS = 5
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GET_DESCRIPTOR = 6
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SET_DESCRIPTOR = 7
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GET_CONFIGURATION = 8
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SET_CONFIGURATION = 9
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GET_INTERFACE = 10
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SET_INTERFACE = 11
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SYNCH_FRAME = 12
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enum Request_types:
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STANDARD_TO_DEVICE = 0
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VENDOR_TO_DEVICE = 0x40
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STANDARD_FROM_DEVICE = 0x80
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VENDOR_FROM_DEVICE = 0xc0
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enum Endpoint_types:
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CONTROL = 0
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ISOCHRONOUS = 1
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BULK = 2
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INTERRUPT = 3
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/**/struct my_config {
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Configuration config;
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Interface interface;
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Endpoint endpoint[2];
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} __attribute__ ((packed))
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static Device const device_descriptor
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static my_config const config_descriptor
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static String <7> const s_manufacturer
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static String <22> const s_product
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enum State:
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IDLE
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TX
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RX
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State state
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char configuration
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unsigned size
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char const *ptr
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unsigned send_next (unsigned old_csr)
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unsigned vendor (unsigned old_csr, Setup *s)
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unsigned get_descriptor (unsigned old_csr, unsigned type, unsigned idx, unsigned len)
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public:
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void init ()
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void log (unsigned c)
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void interrupt ()
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unsigned handle_setup (unsigned old_csr, Setup *s)
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Udc::Device const Udc::device_descriptor = { sizeof (Device), Device::Type, 0x200, 0, 0, 0, max_packet_size0, 0x601a, 0x4740, 0x100, 1, 2, 0, 1 }
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Udc::my_config const Udc::config_descriptor = {
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(Configuration){ sizeof (Configuration), Configuration::Type, sizeof (my_config), 1, 1, 0, 0xc0, 1 },
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(Interface){ sizeof (Interface), Interface::Type, 0, 0, 2, 0xff, 0, 0x80, 0 }, {
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(Endpoint){ sizeof (Endpoint), Endpoint::Type, 1, BULK, max_packet_size_bulk, 0 },
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(Endpoint){ sizeof (Endpoint), Endpoint::Type, 0x81, BULK, max_packet_size_bulk, 0 }
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}
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}
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Udc::String <7> const Udc::s_manufacturer = { sizeof (String <7>), String <7>::Type, { 'I', 'n', 'g', 'e', 'n', 'i', 'c' } }
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Udc::String <22> const Udc::s_product = { sizeof (String <22>), String <22>::Type, { 'J', 'Z', '4', '7', '4', '0', ' ', 'U', 'S', 'B', ' ', 'B', 'o', 'o', 't', ' ', 'D', 'e', 'v', 'i', 'c', 'e'} }
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void Udc::init ():
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state = IDLE
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configuration = 0
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size = 0
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// exit suspend mode by reading the interrupt register.
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unsigned i = UDC_INTRUSB
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// reset all pending endpoint interrupts.
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i = UDC_INTRIN
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i = UDC_INTROUT
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// enable interrupt on bus reset.
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UDC_INTRUSB = UDC_INTR_RESET
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// enable interrupts on endpoint 0.
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UDC_INTRINE |= 1 << 0
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unsigned Udc::send_next (unsigned old_csr):
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for unsigned i = 0; size > 0 && i < max_packet_size0; ++i, --size:
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// Use 8-bit transfers to avoid problems with alignment.
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REG8 (UDC_FIFO_EP0) = *ptr++
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if size:
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state = TX
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return (old_csr | UDC_CSR0_INPKTRDY) & ~UDC_CSR0_DATAEND
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else:
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state = IDLE
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return old_csr | UDC_CSR0_INPKTRDY
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unsigned Udc::vendor (unsigned old_csr, Setup *s):
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if s->request_type & 0x80:
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ptr = "abcdefgh"
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size = 8
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return send_next (old_csr)
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return old_csr
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unsigned Udc::get_descriptor (unsigned old_csr, unsigned type, unsigned idx, unsigned len):
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switch type:
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case Configuration::Type:
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if idx != 1:
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return old_csr | UDC_CSR0_SENDSTALL
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ptr = reinterpret_cast <char const *> (&config_descriptor)
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size = (len < sizeof (config_descriptor) ? len : sizeof (config_descriptor))
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break
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case Device::Type:
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if idx != 0:
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return old_csr | UDC_CSR0_SENDSTALL
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ptr = reinterpret_cast <char const *> (&device_descriptor)
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size = (len < sizeof (device_descriptor) ? len : sizeof (device_descriptor))
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break
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// The 7 is an arbitrary number.
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case String <7>::Type:
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switch idx:
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case 1:
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ptr = reinterpret_cast <char const *> (&s_manufacturer)
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size = (len < sizeof (s_manufacturer) ? len : sizeof (s_manufacturer))
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break
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case 2:
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ptr = reinterpret_cast <char const *> (&s_product)
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size = (len < sizeof (s_product) ? len : sizeof (s_product))
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break
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default:
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return old_csr | UDC_CSR0_SENDSTALL
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break
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default:
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return old_csr | UDC_CSR0_SENDSTALL
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return send_next (old_csr)
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unsigned Udc::handle_setup (unsigned old_csr, Setup *s):
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switch s->request_type:
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case STANDARD_TO_DEVICE:
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switch s->request:
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case SET_ADDRESS:
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UDC_FADDR = s->value
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break
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case SET_CONFIGURATION:
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if s->value >= 2:
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return old_csr | UDC_CSR0_SENDSTALL
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configuration = s->value
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break
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case SET_INTERFACE:
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if s->value != 0:
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return old_csr | UDC_CSR0_SENDSTALL
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break
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default:
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return old_csr | UDC_CSR0_SENDSTALL
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break
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case STANDARD_FROM_DEVICE:
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switch s->request:
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case GET_STATUS:
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ptr = "\0\0"
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size = (s->length < 2 ? s->length : 2)
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return send_next (old_csr)
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case GET_DESCRIPTOR:
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return get_descriptor (old_csr, (s->value >> 8) & 0xff, s->value & 0xff, s->length)
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case GET_CONFIGURATION:
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ptr = &configuration
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size = (s->length < 1 ? s->length : 1)
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return send_next (old_csr)
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case GET_INTERFACE:
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ptr = "\0"
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size = (s->length < 1 ? s->length : 1)
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return send_next (old_csr)
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default:
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return old_csr | UDC_CSR0_SENDSTALL
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break
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case VENDOR_TO_DEVICE:
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case VENDOR_FROM_DEVICE:
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return vendor (old_csr, s)
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default:
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return old_csr | UDC_CSR0_SENDSTALL
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return old_csr
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void Udc::interrupt ():
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unsigned i = UDC_INTRUSB
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if i & UDC_INTR_RESET:
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state = IDLE
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return
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i = UDC_INTRIN
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if i & (1 << 0):
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// Interrupt on endpoint 0.
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unsigned csr = UDC_CSR0
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if csr & UDC_CSR0_SENTSTALL:
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csr &= ~UDC_CSR0_SENTSTALL
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state = IDLE
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if csr & UDC_CSR0_SETUPEND:
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csr |= UDC_CSR0_SVDSETUPEND
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state = IDLE
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switch state:
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case IDLE:
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if !(csr & UDC_CSR0_OUTPKTRDY):
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break
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csr |= UDC_CSR0_SVDOUTPKTRDY | UDC_CSR0_DATAEND
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union { unsigned d[2]; Setup s; } packet
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packet.d[0] = UDC_FIFO_EP0
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packet.d[1] = UDC_FIFO_EP0
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csr = handle_setup (csr, &packet.s)
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UDC_CSR0 = csr
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break
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case TX:
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UDC_CSR0 = send_next (UDC_CSR0 | UDC_CSR0_DATAEND)
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break
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case RX:
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// Not supported.
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UDC_CSR0 |= UDC_CSR0_SENDSTALL
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state = IDLE
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break
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void Udc::log (unsigned c):
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Kernel::Num start ():
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map_udc ()
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Udc udc
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udc.init ()
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Kernel::Cap logcap = Kernel::my_receiver.create_capability (Init::LOG)
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__asm__ volatile ("li $a0, 1\nlw $a1, %0\nbreak" :: "m"(logcap.code): "a0", "a1", "memory")
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Kernel::register_interrupt (IRQ_UDC)
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while true:
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Kernel::wait ()
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switch Kernel::recv.protected_data.l:
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case IRQ_UDC:
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udc.interrupt ()
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break
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case Init::LOG:
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udc.log (Kernel::recv.data[0].l)
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break
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default:
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udc.log ('~')
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break
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